Can U.S. farms produce food without relying heavily on fossil fuels?

From SmartPlanet.com By Melissa Mahony Along with drought and blight worries, stressing about future fossil fuel prices and availability keeps many farmers counting sheep at night. Conventional farmers in the United States use a lot of fossil fuels, and not just in tractors. Through petrochemicals comprising synthetic fertilizers, weed killers and insecticides, fossil fuels can help boost crop yields. These …