From the Daily News:
The bucolic farms of middle America are getting some stiff competition from the rooftops of New York City.
A growing number of commercial farms housed several stories high throughout the city are producing crops year-round — in many cases without even using dirt.
Several city farms are looking for more rooftop space to grow their local food businesses. And swaths of Queens and Brooklyn with large expanses of industrial rooftops are prime candidates for the urban agriculture expansion.
“In dense cities like New York, there isn’t an enormous amount of vacant land,” said New School Professor Nevin Cohen, who specializes in urban agriculture.
But “there are thousands of acres of rooftop space in New York City potentially suitable for agriculture — with more than 1,000 acres in Queens,” he said.