"The U.S. drinking water and sewage infrastructure earned a barely passing grade of D from the American Society of Civil Engineers today, which said at least $1 trillion is needed to fix the problem."

"Even as a Red Tide algae bloom is wiping out a record number of manatees in southwest Florida, a mysterious ailment is killing dozens more manatees on the state's east coast. So far, state biologists have been unable to pinpoint the cause."

"An underground plume of toxic hydrocarbons from an oil spill north of the Colorado River near Parachute has been spreading for 10 days, threatening to contaminate spring runoff."

"Missouri Republican Sen. Roy Blunt said on Monday that he is placing a hold on Gina McCarthy, President Obama’s pick to run the Environmental Protection Agency, which could delay a full Senate vote on the nominee."

"NEW ORLEANS -- BP's cement contractor on the Deepwater Horizon rig has discovered cement samples possibly tied to the ill-fated drilling project that weren't turned over to the Justice Department after the 2010 oil spill, a lawyer for the contractor said Thursday."

"KALAMAZOO, Mich. -- The U.S. Environmental Protection Agency is ordering Enbridge Inc. to do additional dredging in the Kalamazoo River to clean up oil from a massive 2010 spill."

"Sick and malnourished sea lion pups are stranding themselves on Southern California beaches in some of the largest numbers seen in over a decade, perplexing scientists and leading one care facility to declare itself near capacity."

"When Uranium Energy Corp. sought permission to launch a large-scale mining project in Goliad County, Texas, it seemed as if the Environmental Protection Agency would stand in its way. To get the ore out of the ground, the company needed a permit to pollute a pristine supply of underground drinking water in an area already parched by drought."

"U.S. EPA will head to court [Thursday] to defend its authority under the Clean Water Act to revoke a strip mining permit issued by the Army Corps of Engineers."

Japan has successfully extracted natural gas from methane hydrates ("fire ice") 1,000 feet below the seabed.