Visiting the huge AeroFarms indoor ag facility in downtown Newark NJ is like watching Matt Damon grow potatoes in The Martian. Unlike on Mars, the farming in Newark is done without soil. A cloth medium is used instead. Add plenty of LED lighting and voila, beautiful greens for your salad. 

A smart warehouse full of growing plants. Lettuce, kale and other leafy greens.

If you saw the movie The Martian you'll get the idea right away. But on a much bigger scale. And not on Mars, but in Newark, New Jersey.

AeroFarms is an agriculture company that uses vertical farming to produce 130 to 390 times the output of a conventional farm. It's all done indoors under LED lights. The lights shine at a specific intensity and spectrum that's tailored to each plant.