NASA To Grow Vegetables In Space With Its Special "Pillows" : "Veggie, the plant growth chamber, has plants in special “pillows” with blue, red and green LEDs. The growth chamber provides nutrient delivery and lighting. But it depends on the cabin’s carbon dioxide and temperature to facilitate plant growth. NASA payload scientist for Veggie, Gioia Massa said in a statement that it will provide a new resource for researchers and astronauts. Massa said determining food safety will be their primary goal for this test."