"California officials said Wednesday they are trying to avert the federal government's threat to seize six parks that could be closed to help reduce the state's ballooning budget deficit."

Engineering projects hope to save Louisiana's shrinking coastal wetlands by diverting sediment from the Mississippi River -- but a new study says there is not enough mud in the Mississippi to do the job.

Two brothers are busting levees to return the Ouachita National Wildlife Refuge to its primeval condition.

"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."

If the Army Corps of Engineers and private companies used all the mud they dredge from wetlands and waterway to rebuild Louisiana coastal marshes, it would be a boon for coastal restoration.

"The Obama administration said Thursday that it would toughen standards for mountaintop-removal coal mining but would not end the practice as some environmental groups had hoped."

"Canada plans to expand one of its most prized parks to more than six times its current size in a move to help protect the habitats of grizzly bears, caribou and other species...."