Companies are poised to go commercial with gasoline substitutes made from grass, algae and the ultimate source: engineered microorganisms
Nations scramble to claim their share of the petroleum riches trapped deep within the Arctic seabed as global warming loosens that ocean's icy grip on its bounty
The U.S. needs a high-voltage transmission system to deliver plentiful energy from wind and sunshine to power-hungry cities. At least one plan has emerged
The massive underground water source feeds the middle third of the country but is disappearing fast. Can it be conserved?
How Obama and his team can pass climate legislation and reach an international accord by December 2009
Photo safaris offer excitement and beauty
- From the Editor