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AI Is Learning To Understand How Vegetables Taste
With the global demand for food escalating, vertical farms are becoming a critical component of agriculture's future. They use robotics, machine learning and artificial intelligence (AI) to automate farming and perfect the growing of greens and vegetables.
By Jennifer Kite-Powell
July 20, 2021
With the global demand for food escalating, vertical farms are becoming a critical component of agriculture's future. They use robotics, machine learning and artificial intelligence (AI) to automate farming and perfect the growing of greens and vegetables. With steady growth, the vertical farming market was had an estimated value of $4.4 billion in 2019 and is expected to reach $15.7 billion by 2025.
Fifth Season is a vertical farm in Pittsburgh that uses super-stack software and robotics to run their fully automated farming systems. And, by combining big data and AI, they have created the optimal grow recipe that determines the best flavor for the plants they grow.
"The role of AI in determining flavor is to leverage big data and AI to ensure you achieve the target flavor — sweetness, spiciness, bitterness, total degree of flavor and texture," said Austin Webb, CEO of Fifth Season.
"Our plant's individualized grow recipe is the unique mix of the different LED lights," said Webb. "The plants go through the grow room with a QR code that communicates that plant's route and tells the automated system where each plant needs to be throughout the process."
Webb says their super stack system, which serves as 'the brain' of the vertical farm maps, maps out each plant's route through the grow room based on its grow recipe and then moves the plants where they need to go.
"We use AI and data to find improvements in all aspects of crop quality, even beyond what humans think they know about flavor profiles. We call this proactive, deterministic growing compared to traditional farming, including greenhouse growing, where you have to be reactive based on weather and sunlight conditions," said Webb. "We then leverage human/chef feedback on what tastes the best and what texture is best and [..] combine that qualitative data with the 26K quantitative data points for every tray of greens per lifecycle."
"From there, we tweak our grow recipes to build the best flavor. For some vegetables, like tomatoes, experts have leveraged Brix scores, but [..] we measure flavor quality based on these factors: sweetness, spiciness, bitterness, the total degree of flavor, texture and color," said Webb. "Humans don't need to guess what iron content or Brix score is best; the brain in our farms can do that. Humans tell the grain what tastes best, and the brain will compute and tweak the grow recipes from there."
Darryn Keiller, CEO and founder of WayBeyond, says that to impact flavor, you either have to change the genetics of the crop or alter the existing biochemical profile.
"For example, growers can impact flavor by adjusting light and nutrients, which can then enhance the texture (crunch, thickness) or flavor (increased sweetness or bitterness)," said Keiller. "Once you determine the key characteristics you want in a crop, you then use machine learning or AI to automate and optimize the production process for consistent growth and be responsive to changing consumer preferences."
"Currently, vertical farms utilize seed stock bred for outdoor farming. Using AI technology, they can create their breeding stock (or lines) better suited for indoor environments. It's about refining your research and development and creating genetics perfect for your environment and management practices while ensuring continuous improvement of commercial production. The potential is huge."
Webb adds that many indoor growers sought to build an outdoor farming system that can thrive indoors; however, Fifth Season chose to apply smart manufacturing principles to agriculture that would enable them to grow food in a new way.
"We grow more than 15K pounds a week of fresh food with 90% less water than what would be required to grow that amount of fresh food on a traditional outdoor farm - and that is done on a footprint of just 25,000 square feet," added Webb.
Webb believes that scaling viable vertical farming operations that can crack code on both the technology and the consumer experience to deliver consistently fresh, nutritious and clean produce changes the consumer shopping significantly.
"It changes our entire definition of what fresh can and should taste like; it changes the ease of access and availability and convenience to fresh food, which brings so much value to consumers," said Webb. "It's another avenue for shoppers to access the freshest, highest-quality food at retail with produce that has a much longer shelf life than we're accustomed.”
Lead Photo: Greens leaving the grow environment on route to harvesting and packaging in Fifth Season's vertical farm in Pittsburgh.
Modern Farming: Coronavirus Outbreak Spurs High-Tech Greenhouse Boom in China
The facility is one of the dozens sprouting up on the outskirts of China's megacities that utilise high-end technology to manage irrigation, temperature and lighting systems to grow vegetables within easy reach of a large and affluent consumer base
June 4, 2021
Emily Chow
SHANGHAI, June 4 (Reuters) - At Chongming Island just outside Shanghai, China’s most populous city, workers collect and pack tomatoes and cucumbers at a glass greenhouse operated by Dutch company FoodVentures, which harvested their first batch of produce at the site in May.
The facility is one of the dozens sprouting up on the outskirts of China's megacities that utilize high-end technology to manage irrigation, temperature, and lighting systems to grow vegetables within easy reach of a large and affluent consumer base.
"There is a trend towards more sustainable and professional supply," said FoodVentures director Dirk Aleven.
"We've seen a huge acceleration since (the) coronavirus, it is even more important now that fresh produce is produced at the spot where it's consumed. Before that, they were transported for thousands of kilometers, even within the borders of China."
By far the world's largest vegetable producer, China has used greenhouses for decades, but food supply disruptions sparked by coronavirus lockdowns in 2020 have accelerated the development of high-tech glass greenhouse facilities.
To avoid future disruptions, municipal governments have said they aim to build up reserves of critical staples, and develop distribution and logistics facilities.
A growing affluent middle class, willing to pay more for higher quality food produced with less pesticides, is also fueling the trend, said greenhouse developers.
The area used for glass greenhouses grew 28% in 2020, well above the 5.9% rise seen in 2019, and faster than the 6% growth seen last year in areas housing cheaper plastic greenhouses, according to consultancy Richland Sources.
Plastic greenhouses help shield crops, but are considered less efficient than glass greenhouses. The latter can churn out high quality produce that is sold directly to retailers, reducing reliance on traditional supply chains.
"We see an irreversible trend since the pandemic in consumers buying more of their groceries online, and spending more on healthier choices and agricultural brands they trust," said Lim Xin Yi, executive director of sustainability at Pinduoduo, China's largest e-commerce platform by users.
BYPASSING THE MIDDLE MAN
Historically, China's vegetable production was concentrated in certain areas and required complex cold chain logistics networks for food to reach major cities' wholesale markets.
The vulnerability of that hub-centric system became apparent in 2020. COVID-19 outbreaks at a seafood market in Wuhan - ground zero for China's coronavirus pandemic - and at a major fresh market in Beijing caused a breakdown in the flow of goods to consumers, leading to food shortage and crop spoilage.
"The pandemic has pushed the fresh food industry to reduce the number of intermediaries in its supply chain network," said Gayathree Ganesan, an analyst at the Economist Intelligence Unit.
A farmer gathers cucumbers at Hengda greenhouse in Shanghai, China May 25, 2021. REUTERS/Aly Song
Built within city limits to reduce distance to buyers, the greenhouses are usually collaborative ventures between Chinese property firms and greenhouse companies from the Netherlands, a key player in agriculture technology.
FoodVentures' greenhouse outside Shanghai is a typical example.
Over three football fields long and two storeys high, one of the facility's units nurtures uniform rows of cherry tomato plants that snake up towards the ceiling. It is capable of producing up to 120 tonnes a month of cherry tomatoes.
"Being healthy is already a first protection against any virus, so people care even more about what they eat," said Aleven. "Secondly, ... we want to get rid of the long logistics because we are not sure if it always works and that's what we've seen during this pandemic."
"Localising it as much as possible is the only answer," he added.
Greenshouse-grown produce is usually sold directly to e-commerce platforms and supermarkets, bypassing the many middlemen and wholesale markets that are a traditional feature of China's vegetable supply chain.
Carrefour China, which is 80% owned by Chinese retail giant Suning, said its cooperation with greenhouses around cities has grown steadily in the past two years to meet consumer demand.
SUSTAINED EXPANSION
Further growth in key cities is likely, with a recent government document showing Beijing aims to more than double its "high-efficiency facility agriculture land" to over 300 hectares by 2025.
That growth could further cement China’s status as top vegetable producer. The country already accounts for 75% or more of global output of cucumbers, green beans, spinach and asparagus.
Xu Dan, CEO of greenhouse operator Beijing HortiPolaris, said his business benefited last year when a second coronavirus wave hit Beijing in June, shutting down a major wholesale market and driving his daily orders up 300%.
"(At that time) supermarkets were looking for growers with the ability to deliver within 24 hours and they had no time to search for new suppliers," he said.
But Xu said China could face some obstacles as it leaps into modern farming.
"The biggest challenges are people, people who have the knowledge to manage greenhouses to produce quality vegetables," he said.
“Most farmers are getting old and their way of production also out of date, replacing such (a) big amount of farmers is really a big challenge.”
Reporting by Emily Chow in Shanghai, additional reporting by Sophie Yu and Dominique Patton in Beijing and Beijing newsroom; Editing by Ana Nicolaci da Costa
Reminder RSVP - Indoor Ag Science Cafe October 20th 11 AM Eastern Time
Learning critical control point for hydroponic food safety - "Hydroponic Crops How can you produce safe vegetables?"
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Learning critical control point
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How can you produce safe vegetables?"
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Indoor Ag Science Cafe is an open discussion forum, organized by Chieri Kubota (OSU), Erik Runkle (MSU), and Cary Mitchell (Purdue U.) supported by USDA SCRI grants.
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What Is Hydroponic Farming?
It is the process of growing crops with nutrient-rich water kept in contact with the plant roots without using soil. This process is touted to significantly reduce the risk of wastage and pollution that can harm the produce and cause diseases, making it popular to health-conscious consumers
Kemkar wants to make a difference through urban farming by introducing the technique of hydroponic farming to all so that they have access to grow their own vegetables at home.
The science of urban farming has become hugely popular in recent times and hydroponics is leading the way in this green revolution. Jui Kemkar, a passionate young entrepreneur with a quest to make a difference through urban farming co-founded Waves Enterprises with a vision to introduce the technique of hydroponic farming to all, such that they have access to grow their own vegetables at home.
“From residential balcony gardening, community farming, or indoor/outdoor commercial farming, hydroponic farming methods prove to be beneficial for all. Residential enthusiasts of hydroponics can grow herbs, green leafy vegetables, tomatoes, cumbers, and even small plants or flowers in the comfort of their own homes,” explains Jui.
Jui’s impressive repertoire of work comprises humanitarian work in rural, urban farming projects in India and empowerment of women. It was when she moved from India to Dubai that she chose to promote hydroponic farming in order that healthy food supplies can either be grown by families in their own homes or produced by companies and supplied at affordable rates in the UAE.
Jui talks about her conviction that the future of farming lies in hydroponics.
What is hydroponic farming?
It is the process of growing crops with nutrient-rich water kept in contact with the plant roots without using soil. This process is touted to significantly reduce the risk of wastage and pollution that can harm the produce and cause diseases, making it popular to health-conscious consumers. This method saves up to 70 percent of water while allowing for a longer growing season and avoiding harmful chemicals.
Jui Kemkar, co-founder of Waves Enterprises.
How suitable is this for Middle East consumers?
The extreme climatic conditions and limited agricultural land availability in the Middle East makes hydroponic farming an excellent agro-solution as it increases farming capability. The absence of soil in the growing process makes it conducive for this method of growth to be used in an indoor or outdoor setting.
Can you explain the actual process behind this?
Plant growth happens through a combination of water, sunlight, carbon dioxide, and mineral nutrients. In traditional farming, these nutrients are derived from the soil. Through photosynthesis, plants transform light energy into chemical energy to form sugars that allow them to grow and sustain themselves. This is the basic premise behind hydroponics where all the elements required for plant growth are the same as with traditional soil-based gardening but only taking away the soil requirements, hence making it convenient to perform the farming process anywhere within a controlled environment.
What are the advantages of this kind of farming?
For one, plants can grow both indoor and outdoor and there is growth observed throughout the year. There is complete control over the nutrient balance with a proven technology that ensures high yield. Research shows that growth is faster with hydroponics and 70 percent less water is consumed in the farming process. No harmful contents enter the plant, as no soil or fertilizer or other harmful chemicals are used. The overall economy of a nation will benefit by promoting local farming and reducing the import of vegetables from other countries.
How affordable is this type of farming?
Residential setups are affordable and can be customized to individual budgets; however, commercial farms can be expensive depending on the extent of growth required. But despite the heavy investments for commercial set-ups, profits of up to 60 percent or more are visible in a short period of time. Profits will vary and depend largely on the type of crop cultivated. For example, due to low operational costs, green leafy vegetables yield more profits.
What kind of environment protection does this offer?
As global warming becomes a bigger issue for the world, there is a constant need for better ways to cut down on CO2 emissions to help the environment thrive. Perhaps one of the greatest ways countries can cut back on harmful greenhouse gasses is through examining how they produce and distribute their food supply. Hydroponic growing has numerous possibilities to produce larger, better-tasting vegetables. This method of growth uses less land, 70 percent less water, and minimum to no use of pesticides or herbicides.
Due to controlled growing environment, growth is possible in all types of climatic conditions. Dry and arid climates are not conducive to the growth of berries, bananas, and citrus fruits; however, one country was able to successfully adopt the hydroponic growing process on a large scale. The produce was grown in 40ft large containers and transported to consumer markets for sale.
What is the future of hydroponic farming?
Hydroponics is the fastest growing sector of agriculture, and it could very well dominate food production in the future. As population increases and agricultural land declines due to poor land management, people will turn to new technologies like hydroponics and vertical farming to create additional channels of crop production.
Growing Upwards: Q & A on Vertical Farming
Over time, farming practices have evolved to use less energy, pesticides, water and other needed inputs to grow the foods we depend on. A type of farming that recently has grown in popularity is vertical farming
By Food Insight
OCTOBER 22, 2019
Over time, farming practices have evolved to use less energy, pesticides, water and other needed inputs to grow the foods we depend on.
A type of farming that recently has grown in popularity is vertical farming. Building off the base concept of how greenhouses operate, this agricultural system allows for large-scale farming to occur on vertically inclined surfaces. Fruits and vegetables can be grown without the use of soil or natural sunlight, and the produce is often able to grow faster than it does in a traditional farm setting. A key advantage of vertical farms is that they can operate in urban areas and don’t require wide-open land; their vertical surfaces can be easily incorporated into a city’s existing structures and buildings.
Vertical farming has now been used in locations where large-scale farming previously has not been possible, such as in urban spaces throughout Brooklyn, New York, and Chicago, Illinois. Vertical farming’s small land usage and positive environmental benefits have the potential to increase sustainability, lower food costs, and increase accessibility and food security across the country.
We’ve touched on vertical farming in previous posts, but to take a closer look, we caught up with expert Ricky Stephens, who works with Agritecture, a vertical farming, and controlled environment agriculture (CEA) strategist group.
Q: What is vertical farming?
Vertical farming is the growing of crops in an indoor/controlled environment setting, in vertical stacks. Typically, vertical farming is done without using soil as the main practice. Instead, vertical farming uses practices like: hydroponics (growing plants in sand, gravel or liquid, with added nutrients but without soil), aeroponics (growing plants with roots suspended in air and nutrients delivered in a fine mist), or aquaponics (using the waste produced by farmed fish as nutrients for hydroponically grown plants).
Q: Why do you think vertical farming is being used as an alternative to traditional farming?
The top reasons for using vertical farming that come to mind for me include:
Vertical farming uses significantly less water than traditional farming. Currently, global agriculture accounts for 70 percent of freshwater withdrawals (use of freshwater). Instead of using up so much water directly, vertical farming often utilizes indoor hydroponics to grow crops. Using a recirculating system to recycle water, indoor hydroponics uses up to 70 to 95 percent less water than would be used in a traditional outdoor in-soil setting.
Vertical farming also eliminates the need for pesticides while reducing hazards. By balancing the use of beneficial insects, having heightened biosecurity protocols, and being in a well-controlled indoor environment, vertical farms can operate pesticide-free.
Vertical farming reduces pressures on our overall land use and addresses our concerns surrounding land scarcity. Due to population growth and land degradation, we’re running out of arable land. Furthermore, with the over-development of certain urban areas into industrial-style buildings (factories, warehouses), there is a plethora of vacant and utilizable spaces in cities that are very close to consumers. These areas are suitable for creating controlled, crop-friendly environments that can further “eating local” efforts.
Q: Where do you see vertical farming being able to help our food supply chain from a supply and sustainability standpoint?
Vertical farming moves production closer to the point of consumption—this means potentially less food miles and increased vegetable access. Let’s take one example of a very commonly consumed and desired food item: leafy greens. Currently, 98 percent of the current U.S. leafy greens production occurs traditionally (as outdoor crops) in California and Arizona. Not only are these water-dense produce items grown in severely water-scarce regions, they are then shipped thousands of miles across the country (and sometimes around the world).
As an alternative, vertical farming can be very useful for the leafy greens industry. In fact, because vertical farming is indoors and unaffected by weather conditions, you can grow greater quantities of different types of leafy greens all year round. In turn, this food can be immediately injected into the local food supply, thereby increasing availability and decreasing food loss and food waste during transportation.
In the long term, vertical farms will increase the diversity of crop choices and become more focused on producing different varieties of highly nutritious and frequently consumed products like mushrooms and strawberries. Vertical farms will also play an integral role in our larger movement toward sustainability and supporting local and regional food systems.
Q: What advances do you think will occur/are needed for vertical farming in the next 5–10 years?
We need technology advances that allow normal people—not just tech entrepreneurs or those with monetary funds—to access fair financing for vertical farms. As it currently stands, vertical farming can be cost-prohibitive to launch and start. For vertical farming to become more widely implemented there is a need for innovations and advances that bring down the high initial investment costs. The good news is this has started happening in the greenhouse space already.
Q: What ag (agricultural) technology excites you the most and why?
Soon we will need to feed upwards of 9 billion people in this world. On one hand, ag technology must be better utilized by farmers. On a more global and sustainable level, any technology that will push us all towards a more circular economy is exciting.
Agricultural technology supported by circular economy principles will begin exploring new business models, processes, and bio-stimulants that will play a major role in transforming our food system to be less wasteful and more regenerative.
Q: Is there anything else you’d like to add?
My team travels the world educating the broader public on the importance and potential of urban agriculture every chance we get. We have organized several of our own conferences in New York and Atlanta. It’s energizing to be working in a field with so many people who are fueled by honest passion and the pursuit of positive change.
We thank Ricky for his urban ag insights and look forward to seeing how more farming advances like vertical farming can positively impact our food system. To learn more about Agritecture and vertical farming, check out the company’s website here at www.agritecture.com.
Article was written by Lily Yang, Ph.D. Postdoctoral Research Associate at Virginia Tech in the Department of Food Science and Technology
Superior Fresh Expanding Their Aquaponics Operation
Superior Fresh utilizes aquaponics to raise seafood and leafy greens for retailers across the Midwest.They are now expanding their greenhouse footprint from six acres to 13 acres and their aquaculture center from 40,000 square feet to 100,000 square feet
Mike Beiermeister
Hixton, Wis. (WXOW) — Superior Fresh utilizes aquaponics to raise seafood and leafy greens for retailers across the Midwest.
They are now expanding their greenhouse footprint from six acres to 13 acres and their aquaculture center from 40,000 square feet to 100,000 square feet.
“Most people wouldn’t think that you could grow organic vegetables in the middle of Wisconsin in the middle of the winter,” said Brandon Gottsacker, president of Superior Green.
The company was founded back in 2011. Since the creation, Superior Fresh has become the first indoor Atlantic Salmon farm in the United States. They are also able to grow leafy greens year-round thanks to their aquaponics system and sustainable practices.
“You know you’re doing something for not just us, for the rest of the world and leading the harvest of the first Atlantic Salmon in the United States, right here,” said Kyle Woolever, aquaculture manager for Superior Fresh.
Aquaponics integrates fish and plant growth to create a symbiotic environment. Superior Fresh utilizes these practices to produce around 4,000 pounds of leafy greens per day and around 4,000 pounds of Atlantic Salmon each week. By this time next year, they plan to produce 25,000 pounds of Atlantic Salmon each week. Right now, they have 200,000 Atlantic Salmon swimming in their tank.
“We’re probably the most sustainable farm on the planet when you talk about how many pounds of fish and produce were producing on the volume of water,” said Gottsacker.
The company uses the bulk of summer sun to shed light on their produce with the help of diffused glass. They use LED lighting for winter months. Their produce is pesticide-free, non-GMO, and constantly controlled for perfect growing.
“Our goal is to locate these farms all over the world, so in theory, you could build a facility like this in the desert, you could build it right outside of a city where food is scarce, or it has travel really far to get there,” said Gottsacker. “Our goal is to provide really good, high quality, safe, healthy food for everyone.”
Mike Beiermeister
WXOW Weekend Anchor and Reporter
Greenhouse Vegetables Available On Remote Islands
The greenhouse kit from Teshuva Agricultural Projects (T.A.P.). is the first one across the Indian Ocean. According to Eric Le Vieux of Esprit Vert Ltd, the local representative of TAPKIT in this region, it should be the first of many
Visitors to the LUX Hotel can from now on enjoy their greens super-fresh. That might not seem very strange - but please keep in mind that the company is located in Belle Mare Plage. Indeed, one of the most beautiful beaches on the world, but also located very remotely: on Mauritius.
That the guests can eat their fresh greens is because the hotel has recently purchased a TAPKIT. The greenhouse kit from Teshuva Agricultural Projects (T.A.P.). is the first one across the Indian Ocean. According to Eric Le Vieux of Esprit Vert Ltd, the local representative of TAPKIT in this region, it should be the first of many.
Open field cultivation
“In Mauritius, as with Seychelles and Maldives, a big percentage of the island’s fruits and vegetables are still imported. Although the greenhouse sector is long-established and continues to develop, the majority of the vegetables we grow are from open field cultivation. The amount of chemical crop protection being used has been creating serious problems not only for the human food chain but also in the ecosystem. There is now a strong movement towards cleaner, more safe production, and the TAPKIT is a perfect opportunity to reduce and even eliminate pesticide use altogether.”
In the beginning of August, the TAPKIT was ready. “We installed an in-line water chiller to lower the irrigation water down to the optimum temperature for the roots to take up the nutrients. Now the unit is getting up to full production. The produce will be enough to meet the requirements of the hotel and may be available to the staff and employees.
Hotel and resorts
“The TAPKIT is an attractive option for large hotels and resorts”, says Eric, "because it provides uniform production all year round, for a wide variety of greens and culinary herbs - all of which are essential daily ingredients for resorts accommodating many guests. Also, many of the world’s leading hotels can be found in remote areas, like small islands or even sandbanks (atolls), where imported produce is hard to acquire still fresh, and likewise, local agriculture is hard to achieve. The TAPKIT raises the quality and the freshness in a big way and it's very exciting to tell customers (hotel guests) that their salads and herbs have travelled zero miles - farm to fork!"
"In addition to being a great financial investment, hotel groups are very committed to improving their sustainability programs, and the TAPKIT is an important enabler for this to happen. We hope to build our next one for a hotel located in Maldives. My team and I are excited about the roll-out of TAPKITs across the Indian Ocean. And most of all, we appreciate the support of our partners in Israel, at Teshuva, who provide vital agronomic support for our growers to make sure they get the most of the greenhouse.”
For more information:
Teshuva Agricultural Projects
60 Nof Harim St., Olesh, 42855 Israel
+972-9-8940507
+972-50-7922579
+1-201-5803003
office@taprojects.com
www.taprojects.com
Publication date: Thu, 26 Sep 2019
Author: Arlette Sijmonsma
© HortiDaily.com
New York's Rooftop Farms Provide Fresh Local Produce - And Help Stop A Sewage Problem
High above the streets of New York, more than 36 tonnes of organic vegetables are grown every year. And the farms that produce them aren’t just feeding residents – they’re helping to stop sewage polluting the city’s rivers too
21 Aug 2019
Douglas Broom Senior Writer, Formative Content
High above the streets of New York, more than 36 tonnes of organic vegetables are grown every year. And the farms that produce them aren’t just feeding residents – they’re helping to stop sewage polluting the city’s rivers too.
Covering a total of 2.3 hectares (5.6 acres), the farms sit on top of three historic industrial buildings. Their soil is just 25 cm (10 inches) deep, but it absorbs millions of litres of rainfall each year – water that would otherwise flush straight into the city’s drains.
New York has long had a problem with what is known as Combined Sewer Overflow, where rainwater inundates water treatment plants causing the sewers to overflow directly into the Hudson and East River.
Growing business
The city has made progress in recent decades, spending $45 billion since the 1980s on wastewater treatment to reduce discharges into waterways. But with more than 70% of its area paved and upwards of 8 million residents, the problem still occurs when it rains heavily.
Brooklyn Grange, which operates the three rooftop sites, built its first farm in 2010. It broke even in its first year, moved into profit two years later and now employs 20 full-time and 60 seasonal staff.
Its founders believe commercial urban agriculture can help cities become cleaner and greener. And they measure their success against a “triple bottom line” – profit, the environment and impact on people.
A buzzing project
Green roofs help urban areas reduce the heat that otherwise radiates on summer nights from conventional rooftops. That not only helps to make the city cooler in summer but also reduces the amount of energy needed to keep the buildings cool.
The rooftop farms use waste food to produce compost. Half their produce is sold to restaurants and they run two weekly markets and deliver locally through a community-supported agriculture scheme, which connects farmers directly to consumers. They are home to 40 beehives, too.
The farms have so far hosted 50,000 young people on educational visits to learn about sustainable city farming. They run public courses on everything from sustainable dye-making to making hot chilli sauces. They host yoga classes and even weddings.
The company has now expanded into designing and building mini farms and wild flower gardens for private clients across the city.
Show
Almost 70% of the global population is predicted to live in cities by 2050. And while cities drive the global economy, they are also responsible for three-quarters of global CO2 emissions.
So projects like these will become ever more important, according to the World Economic Forum Global Future Council on Cities and Urbanization, if urban areas are to meet targets such as those set out in the UN's Sustainable Development Goals and the Paris Agreement on climate change.
Lead Photo: New York has spent $45 billion on wastewater treatment since the 1980s. Image: REUTERS/Seth Wenig