Near Bradshaw, Nebraska, the four Harrington sisters fight the Keystone XL pipeline, which they fear could threaten land their family has farmed for 150 years. Their unpainted, solar-powered barn, plastered with slogans, sits smack in the path of the pipeline.

"Pope Francis, who pledged on the day of his installation as pontiff to make the environment a priority, is drafting a highly anticipated encyclical on ecology and climate change."

"A Northern California man who was convicted of masterminding a plot to blow up two federal facilities and had his 20-year sentence cut short because prosecutors failed to turn over all their evidence to defense lawyers says he was entrapped by a female FBI informant for whom he harbored romantic feelings."

"The Indian government has launched a crackdown on Greenpeace and other U.S.-linked environmental groups after intelligence officials accused climate activists of harming the country’s economic security."

"Radical environmentalists who threw acid and smoke bombs at Japanese whalers were found in contempt of court for continuing their relentless campaign to disrupt the annual whale hunt off the waters of Antarctica."

"BERKELEY -- Oil trains that could roll through some Bay Area cities on their way to a Central Coast refinery will not carry volatile Bakken crude, but another type that comes with equally dire threats to the environment and public safety, environmentalists warn."

"A coalition of activists on Tuesday protested outside the office of the federal Bureau of Land Management in Reno to decry an auction of huge tracts of public land for private oil and gas exploration that they claim damages the environment and guzzles water in a time of drought."

"Prince William will begin his US tour by branding the illegal wildlife trade as one of the most “insidious forms of corruption” in the world. The Duke and the Duchess of Cambridge arrived in New York last night for a three-day visit that has generated much excitement among New Yorkers."

"The new chairman of the small but influential climate advocacy nonprofit 350.org is promising to keep fighting the proposed Keystone XL oil pipeline while expanding his activist group."