"WASHINGTON — The White House says a new environmental assessment from the State Department isn't the last step in deciding whether the Keystone XL pipeline can be built."

"A coalition of business, energy and farm groups are spending millions of dollars to fight the Obama administration’s effort to regulate greenhouse gas emissions from power plants and other sources."

"Former New York City Mayor Michael Bloomberg has been tapped to be U.N. special envoy for cities and climate change, sources familiar with the situation said on Thursday."

"Life has never been easy for just-hatched Magellanic penguins, but climate change is making it worse, according to a decades-long study of the largest breeding colony of the birds."

"HOUSTON — Faced with growing criticism and lawsuits, an oil industry task force representing hundreds of companies in North Dakota pledged on Wednesday to make an all-out effort to capture almost all the natural gas that is being flared in the Bakken shale oil field by the end of the decade."

"Seventeen foundations controlling nearly $1.8 billion in investments have united to commit to pulling their money out of companies that do business in fossil fuels, the group plans to announce on Thursday."

"WASHINGTON -- The National Security Agency monitored the communications of other governments ahead of and during the 2009 United Nations climate negotiations in Copenhagen, Denmark, according to the latest document from whistleblower Edward Snowden."

"Polar bears have shifted to a diet of more land-based food in response to climate change and melting sea ice in the Arctic, new research finds."

"During President Obama’s speech tonight, he announced many different ways he would use the executive branch to pursue strong action on climate change. For longtime readers, this is old hat by now; I’ve been over how the EPA can use its pollution authority to cut back on carbon emissions several times. The policy framework hasn’t changed."