"Barack Obama will use all of his powers – including his veto – to defend his plan to fight climate change, the White House said, on the eve of new rules cutting carbon pollution from power plants."

"Though the amount of microcystin present in raw Lake Erie water near Toledo’s water-system intake Wednesday was double the amount detected two days earlier, city officials announced they planned to scale back testing for the toxin."

"It's late summer, and Americans are flocking to the country's national parks for some recreation and fresh air."

"WASHINGTON -- A new government rule that promises to do more to protect streams near coal mining operations entered a critical stage this week, with coal industry lobbyists and environmentalists already lining up for battle."

"A conservation group found 36 U.S. national parks had moderate or worse levels of ozone pollution in a report card released on Tuesday, with four parks in California receiving the worst grades for health effects."

"A U.S. appeals court on Tuesday mostly upheld a major federal environmental regulation requiring some states to limit pollution that contributes to unhealthy air in neighboring states."

"Seven years after the end of a much-lauded program to monitor mercury in Louisiana’s waterways, state officials lack updated data to warn people about any potential contamination in the fish they catch and eat."

"The Kalamazoo River near Marshall, Mich. today teems with kayakers paddling amid swimming turtles, buzzing dragonflies and fish that leap from the water—with few visible scars of the environmental disaster that struck the riverside community five years ago."

"The federal administrators and elected leaders overseeing the restoration of the Chesapeake Bay say there are signs that the watershed is getting cleaner. But environmental advocates say the restoration process is falling dangerously behind schedule."