With rising gas prices and global temperatures, corn-based ethanol seemed to promise a bright energy future. Now, as corn's dark side becomes ever clearer, switchgrass offers a better alternative as well as a first step to restoring the prairie that once blanketed this country's heartland.
An innovative collaboration between scientists is discovering how, 700 years ago, a mysterious, prehistoric culture overcame its landscape’s harsh constraints. The findings may tell a cautionary tale for today’s Southwest.
There’s more carbon locked up in the high north’s permafrost than the combined total released into the atmosphere by humans. The big melt going on right now in the Arctic could trigger a train of catastrophic events across the world.
Interior Secretary Ken Salazar has issued voluntary federal guidelines to minimize the impact of wind power facilities on wildlife by approving them in the right places. Audubon is doing its part, too.