'Senior' from the reality TV show 'American Chopper' has invented a zero-emission hog. It's 'Easy Rider' minus the ear-splitting roar (and greenhouse gases).
A new study finds that hydrofluorocarbons could become a significant factor in future warming.
Tuvalu, a nation of nine islands, is taking steps to completely rely on renewable energy by 2020.
The US has the lowest rate of intercity rail usage, but Congress is taking steps to change this.
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.