"Polar bear populations in and around Alaska are declining due to continued melting of sea ice and Russian poaching, according to reports released Thursday by the U.S. Fish and Wildlife Service."

Estimated U.S. gas reserves have increased by 35 percent, according to a group of experts connected with the Colorado School of Mines -- although much of that increase would come from hydraulic fracturing of shale, a technique whose effects raise environmental concern.

"The Senate approved a $1 billion program yesterday to give vouchers to consumers who trade in their gas-guzzling clunkers for more fuel-efficient models -- a move that dealers hope will revive slumping auto sales."

"Environmentalists praised Senate lawmakers on Thursday for approving legislation that more clearly defines which bodies of water are subject to federal regulation."

"The number of animals poisoned, shot or snared by the U.S. Department of Agriculture more than doubled last year, and environmentalists who are critical of the killings are renewing their effort to cut the program's funding."

Navajo people are fighting the return of uranium mining they say threatens to despoil their lands and health.

Small-scale, local power generation could reshape our energy system.

"Water supplies for 33 million people could be endangered if millions of acres of beetle-ravaged forests in the Rocky Mountains catch fire, a U.S. Forest Service official said Tuesday."

"The Mekong has long flowed freely, supporting one of the world’s great inland fisheries. But China is now building a series of dams on the 2,800-mile river that will restrict its natural flow and threaten the sustenance of tens of millions of Southeast Asians."

"By the middle of next year, the nine campuses that make up the nation's largest community college system plan to be completely energy self-sufficient. It's a huge step, and it will begin saving money immediately."