For a long time this TreeHugger was dismissive of vertical farms, agreeing with Adam Stein who wrote that "Using urban real estate in this manner is incredibly wasteful: bad for the economy and bad for the environment. Local food has its merits, but that's what New Jersey is for." As recently as a year ago I was calling them在这么多级别上错误.
©Vincent Callebaut Architects
At the time, almost eight years ago, when we were dissing vertical farms, it was all about visions of new towers in the city, expensive purpose-built structures that I thought were "good drawings, lots of ideas and great fun" but unrealistic, like Vincent Callebaut's silly Farmscrapers. I was probably right about that, and Adam Stein was right about New Jersey.
The vertical farm that is changing the way we think about vertical farms is in fact in Newark, New Jersey, inside an existing old steel warehouse that has been converted rather than an expensive new facility. It's called Aerofarms, and Margaretwrote about it when it was proposed two years ago.
When TreeHugger friends Philip and Hank complained about the economics of vertical farms, they noted in EcoGeek:
但是，如果您读了伊恩·弗雷泽（Ian Frazier）的纽约人的精彩文章，垂直农场，you find that they did actually solve most of those problems at Aerofarms. The cost of the real estate per square foot is irrelevant, because the plants are stacked in trays eight high.
They are set in a repurposed old building in a city that's very close to New York city but has relatively cheap industrial real estate.
Then there are the changes in technology. LED lighting has evolved to where they can tune the lighting to the exact colours that the plants need for photosynthesis, saving huge amounts of electricity and excess heat over the broad fluorescents and metal halide lights of a decade ago.
And water? Using technology developed by inventor Ed Harwood of Ithaca, New York, the plants are suspended in a fabric made from old pop bottles. Frazier writes:
The air in the building is rich in CO2, the lighting is just right, the nutrients are fed at just the right rate using seventy percent less water, and it is all carefully monitored by computers and technicians.
... each plant grows at the pinnacle of a trembling heap of tightly focussed and hypersensitive data. The temperature, humidity, and CO2 content of the air; the nutrient solution, pH, and electro-conductivity of the water; the plant growth rate, the shape and size and complexion of the leaves—all these factors and many others are tracked on a second-by-second basis. AeroFarms’ micro-, macro-, and molecular biologists and other plant scientists overseeing the operation receive alerts on their phones if anything goes awry. A few even have phone apps through which they can adjust the functioning of the vertical farm remotely.
©New York Magazine October 2007
©Aerofarms baby greens
A decade ago we called them pie in the sky, and thought nothing would come of it. Today, I am not so sure. I think I have to eat my words, along with some Aerofarms baby greens the next time I am in New York.