NPR's Scott Simon keeps hundreds of compost worms like this one in a bin on his balcony. Scott Simon/NPR hide caption
sustainable
Allagash employees Salim Raal, left, and Brendan McKay stack bottles of Golden Brett, a limited release beer fermented with a house strain of Brettanomyces yeast. The Maine brewery recently installed solar panels as part of its sustainability initiatives. Derek Davis/Portland Press Herald via Getty Images hide caption
A farmer in India piles millet in a field. Grains such as millet and sorghum pack a powerful nutritional punch, but they are overlooked for calorie-laden commodity crops such as wheat or maize. Sam Panthaky/AFP/Getty Images hide caption