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

"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."

"Sea Shepherd is claiming victory after Japan temporarily suspended its annual whale hunt in the Southern Ocean."

Two retired outdoorsmen -- with help from water researchers -- are testing streamwater in western Pennsylvania. They are struggling to get EPA attention to chemicals they fear could be related to the fracking boom.

"SOUTHERN OCEAN -- The Japanese whaling factory ship Nisshin Maru has collided with two whale conservation vessels and its own refueling tanker in Australia’s Antarctic waters, damaging the other ships. No injuries are reported."

"Fresh off a wave of success in the California Capitol last year, animal welfare groups are taking aim at a new target this year: hunting with lead ammunition."

A Texas company quit plans to build a coal-fired power plant -- blaming President Obama's environmental rules, but admitting the low price of natural gas was a key reason.

"Event billed as largest climate protest in US history intended as show of force as Obama nears decision on controversial project."

"The US Supreme Court has denied a plea from anti-whaling group Sea Shepherd to end restrictions on its movement as Japan's whalers accused the activists of violating orders to stay away."

"Anonymous billionaires donated $120m to more than 100 anti-climate groups working to discredit climate change science."

Some 48 prominent activists were arrested at the White House Wednesday when they protested the proposed Keystone XL pipeline, which they say will worsen climate change. The Obama administration faces an upcoming decision on completing the pipeline.

Pope Benedict XVI was known as the Green Pope.