Rescuers are struggling to save manatees in Florida, there a Red Tide algal bloom has killed 181 of the mammals so far this year.

"Two advocacy groups have come up with a new tactic to show how climate change—and laws to deal with it—could make investments in fossil fuel companies riskier and rock financial markets."

"Rep. Paul Ryan (R-Wis.) on Tuesday released his budget proposal calling for approval of the Keystone XL pipeline and slashing the discretionary spending that helps protect Americans from climate-related threats."

"March is Women's History Month, and HuffPost Green is honoring female environmentalists that have helped defend the planet."

"Thousands of anti-nuclear protesters have gathered across Japan. The rallies come on the eve of the two-year anniversary of an earthquake and tsunami that caused the Fukushima disaster."

"BILLINGS, Mont. -- Environmental groups filed a federal lawsuit Wednesday against the owners of Montana's massive Colstrip coal-fired power plant, seeking to force the installation of more pollution controls at the decades-old facility."

Tens of thousands of fishermen and activists have written the Food and Drug Administration, which is considering approving genetically engineered salmon as food. They worry the giant fish could escape into the wild and interbreed with natural salmon.

"Environmentalists have a hope. If they can block the Keystone XL pipeline, they can keep Canada from developing more of its dirty tar sands oil. It takes a lot of energy to get it out of the ground and turn it into gasoline, so it has a bigger greenhouse gas footprint than conventional oil. But the State Department report, which was released Friday, says Keystone won't have much of an impact on the development of that oil from Alberta."

"A US court has declared the conservation group Sea Shepherd to be 'pirates' and ordered it to stop its aggressive actions against Japanese whalers."