By 2050, the world will need to feed 9.7 billion people — 2.4 billion more than today.

A growing movement of people believes that indoor farming could be a solution to the increasing demand for food. Instead of natural sunlight, crops grow under LED lights and in a nutrient-rich water-based solution that mimics soil.

Using this technique, farmers can grow produce year-round in urban areas, monitor progress with embedded sensors, and deliver produce within hours of harvest.

A startup called Local Roots makes indoor farms, called TerraFarms, from shipping containers. The team operates the farms near its customers, which include large corporate offices (SpaceX is one of them) as well as giant distribution centers for restaurants and grocery stores.

Local Roots will deploy more than 100 new TerraFarms in 2018. The company is also moving into a new, 165,000-square-foot manufacturing and headquarters in Vernon, California.

We toured a farm in New York City in early December. Take a look inside below.