The potential for urban farming

Groovy Green - Fully 1/5 of the people in America who could be working are not currently working.  I think urban farming could be this generation’s way to handle unemployment, sort of like a 2011 version of the CCC.

SPIN farming is a method developed by a farming couple in Canada when they realized that they could make more money by growing intensively on less land if they grew the right crops at the right times.

They have a farm income calculator on their site that suggests that a farmer with 1/2 an acre can generate $24,000 in gross sales on the low end up to $72,000 on the high end. 

…If you take the top 10 of our largest cities they would represent 21,760 acres of vacant space per city (640 acres per sq miles * 34 sq miles).  That would work out to 210,760 acres across those 10 cities.