Long-established Shelburne Farms program in Vermont sends out ripples worldwide.
Americans participating in the 'Cash for Clunkers' program are buying new cars that get, on average, 9.6 miles per gallon more than their trade-ins.
It shows catch quotas, ocean zoning, and different fishing gear is helping to restore fisheries and their ecosystems.
New scientific discoveries about plants and snails.
A new study suggests the movement of masses of tiny marine creatures could have as much impact as the wind or currents on ocean circulation.
Environmentalists tout sustainable fish for the dish.
Scientists look at why the numbers of caribou are declining.
Scientists and skeptics of human-induced climate change differ in their answers.