"SALT LAKE CITY -- Animal-welfare activists filed a lawsuit Monday to overturn a Utah law that prohibits undercover filming while trespassing at farm operations, saying it restricts free expression."

"When environmental journalist David Sassoon began reporting about the billionaire Koch brothers’ interests in the Canadian oil industry last year, he sought information from their privately held conglomerate, Koch Industries. The brothers, who have gained prominence in recent years as supporters of and donors to conservative causes and candidates, weren’t playing. Despite Sassoon’s repeated requests, Koch Industries declined to respond to him or his news site, InsideClimate News."

"Evangelical scientists have urged members of Congress to act on climate change in a letter calling for legislation to reduce carbon emissions and protect the environment."

The incidence of autism has increased in recent decades, but scientists are still struggling to understand what causes the developmental disorder. Now they are starting to suspect "environmental epigenetics" may play a key role in its origin.

"Six activists climb Europe's tallest building in a protest against oil and gas drilling the Arctic."

"WASHINGTON -- Environmentalists on Monday filed a petition with the U.S. government requesting regulatory safeguards for 81 particularly vulnerable marine wildlife species, from corals to sharks."

"NORFOLK, Va. — Even some supporters do not know what to make of it. PETA, considered by many to be the highest-profile animal rights group in the country, kills an average of about 2,000 dogs and cats each year at its animal shelter here."

"Josh Fox galvanized the U.S. anti-fracking movement with his incendiary 2010 documentary 'Gasland.' Now he’s back with a sequel — and this time, he’s targeting an audience of just one."

"VESTAL, N.Y. -- Big energy companies have been trying for five years to tap the riches of the Marcellus Shale in southern New York, promising thousands of new jobs, economic salvation for a depressed region, and a cheap, abundant, clean-burning source of fuel close to power-hungry cities. But for all its political clout and financial prowess, the industry hasn't been able to get its foot in the door."

"James “Randy” Udall, the brother of Sen. Mark Udall (D-Colo.) and an avid hiker who had gone missing in Wyoming, was found dead by a search and rescue team Wednesday, the family announced. He was 61."

"Koch Industries, one of the largest privately held corporations in the world and principally owned by billionaires Charles and David Koch, has developed what may be the best funded, multifaceted, public policy, political and educational presence in the nation today."

"Foes of the proposed Keystone XL pipeline, which would carry oil from Canada to Texas, said on Thursday that an expected White House package of proposals to combat climate change was not an adequate trade-off for approval of the controversial project."

"As the Environmental Protection Agency seeks public comment on how to gauge the environmental impact of a proposed gold and copper mine in the Bristol Bay watershed, hundreds of thousands of Americans have weighed in on one side or another."

"Add Al Gore to the chorus of environmentalists who say it’s time for President Barack Obama to get serious about climate change."

"LIMÓN, Costa Rica -- Costa Rican environmentalist Jairo Mora Sandoval was murdered on May 30, while attempting to protect leatherback turtle nests on Moín Beach, on Costa Rica’s northern Caribbean coast. He was 26."