Experts on rare and threatened species issue a warning that lemurs and slipper orchids are at risk of widespread extinction.
A steady trickle of water is bringing wildlife back to a few parts of the Colorado River Delta.
Many old hard-rock mines—not just the one in Colorado that tainted a river with orange metallic waste—have pollution problems.
The shale gas industry maintains that its safeguards protect drinking water and land. But there have been accidents, and mistrust has been sown as the industrial process has moved into rural communities.
The Panama Canal is being widened. That means bigger ships and more cargo for Gulf and East Coast ports-and more alien species too.
The North American animals, which turn white each winter, may adapt to less snow by staying brown for longer periods, researchers suggest.
Well-managed courses offer better habitat than some farm and park ponds.
As California's drought endangers Chinook salmon, fisheries officials release 600,000 baby salmon into the Sacramento River, triple the usual number, in hopes that many return to spawn.
A judge's ruling in the 2010 Gulf oil spill could have widespread consequences.
The president also pledged to fight illegal fishing and seafood fraud.