Hydroponic and vertical farming

Inside a 300,000-square-foot greenhouse in Riverhead, Long Island, a farming revolution is flourishing. It's not what's being grown, but how it's being grown, and when. When most traditional farmers on the East Coast wrap up their growing seasons in late fall, Carl Gabrielsen is just getting started.

Hydroponic farming is the practice of growing plants indoors and without soil. It originated more than 60 years ago recently became more popular for growing food.

Growing hydroponically allows farmers to cheat the seasons, but it's also brought fresh produce to places where there's no room to grow the traditional way. Despommier helped create the concept of vertical farming, which is just what it sounds like, growing food from the bottom up.