We may cultivate crops in space one day, so scientists are running an Antarctic greenhouse to prepare. They've harvested the first crop, but like any space mission, it's a bit tricky.
LEF Farms is investing $10 million to grow gourmet lettuce indoors in New Hampshire. Neighbors say they support the idea of locally grown food, but worry that the lights may affect property values.
Canada, despite its cold weather, ships more fresh tomatoes, peppers and cucumbers to the U.S. than we send the other way. How? With the continent's largest cluster of greenhouses.
Greenhouses could make local fruits and vegetables more available year-round, but they're energy intense. In the Midwest, some growers tap into the Earth's internal heat to warm the structures.
The U.S. doesn't grow many vegetables indoors. We have California, Arizona and Latin America to supply us in winter instead. But entrepreneurs are betting on greenhouses to supply more fresh food.
