WASHINGTON –- The Environmental Protection Agency on Wednesday announced new standards for ozone pollution that have riled up public health advocates and industry.

EPA Administrator Gina McCarthy announced in an op-ed on CNN that the agency is proposing to lower the standard from where it is...

WASHINGTON -– Buoyed by the recent United States-China climate deal, the top climate negotiator for the U.S. said Monday that he's optimistic heading into this year's meeting in Lima, Peru.

"I think it will give momentum to the negotiations," said U.S. climate envoy Todd Stern in remarks at the Center...

WASHINGTON –- After six days of political wrangling and vote-whipping, the Senate failed to pass a bill on Tuesday forcing authorization of the Keystone XL pipeline, dashing hopes of Sen. Mary Landrieu (D-La.) to add the vote to her list of accomplishments heading into a tough runoff election.

Fifty-nine...

WASHINGTON –- TransCanada Corp., the company seeking to build the Keystone XL pipeline, has teamed up with the world's largest public relations firm to promote a proposed alternative pipeline that's entirely in Canada.

Greenpeace Canada obtained documents that the U.S. public relations firm Edelman drafted for TransCanada that outline a...

WASHINGTON -– The Senate's vote next week on legislation to force approval of the Keystone XL pipeline may come down to a handful of Democrats, who are now being courted aggressively by advocates on both sides of the debate.

As of Friday afternoon, Sen. Mary Landrieu (D-La.) had 59...

WASHINGTON – The House of Representatives passed a measure Friday that would force approval of the Keystone XL pipeline.

The House approved the Keystone measure by a vote of 252 to 161. Nearly all Republicans voted for the bill, along with 31 Democrats. One Republican, Rep. Justin...

WASHINGTON –- President Barack Obama will pledge $3 billion this weekend to an international fund that helps developing countries address climate change, in yet another move seen as important to advancing cooperation toward a global climate agreement.

The fund, known as the Green Climate Fund, was created four...

WASHINGTON -- Legislation to force the approval of the Keystone XL pipeline picked up support Thursday as more Democratic senators signed on to Sen. Mary Landrieu's effort.

On Wednesday, the Senate struck a deal to debate and a vote, probably Tuesday, on the measure from the Louisiana Democratic...

WASHINGTON -– If anyone thought the announcement of a bilateral U.S.-China climate agreement on Wednesday might lead to a breakthrough on climate policy in Washington, Senate Republicans would like to inform them otherwise.

The presumptive Senate majority leader, Mitch McConnell (R-Ky.), said he was "distressed" by...

WASHINGTON –- Sen. Mary Landrieu (D-La.), whose future in the Senate is still undecided, is making a big push to get a vote on her legislation to force approval of the Keystone XL pipeline.

"This has been a project that has lingered far too long," said Landrieu in a floor...

WASHINGTON -- The only climate change Sen. Mitch McConnell (R-Ky.) was interested in Wednesday was the one coming to the U.S. Senate, as he greeted a new crop of GOP senators-elect on Capitol Hill.

As for President Barack Obama's announcement on Wednesday of a climate agreement with China,...

Conservatives who reject the science of climate change aren't necessarily reacting to the science, according to a new study from researchers at Duke University. They're reacting to the fact that they don't like proposed solutions more strongly identified with liberals.

The paper, published in the Journal of Personality...

WASHINGTON -– To say Tuesday was a bad day for environmental groups would be an understatement.

In his opening remarks at a National Press Club event recapping the election results Wednesday afternoon, League of Conservation Voters President Gene Karpinski joked that environmental groups had thought twice about even holding the...

WASHINGTON -- Tom Steyer's climate-focused electoral efforts came up with mixed results Tuesday, but the billionaire environmentalist and former hedge fund manager said he has no buyer's remorse.

"I think it was money incredibly well spent. The fact of the matter is, we think this is the big issue facing...

WASHINGTON -– The new Senate Republican majority creates an opportunity for likely Majority Leader Mitch McConnell (R-Ky.) to force a vote on the proposed Keystone XL pipeline he's been waiting years to hold.

By The Huffington Post's count, the new Senate will have at least 61 votes...

WASHINGTON -- Democracy for America, a grassroots progressive group, is trying to organize a last-minute push to get out voters on a Native American reservation in South Dakota that the group argues may be key to Democratic control of the U.S. Senate.

Two polling locations in Shannon County, South Dakota,...

A freak early-season snowstorm has paralyzed large parts of Maine, leaving thousands without power and putting a damper on today's election.

Some parts of the state recorded up to 21 inches of snow. CentralMaine.com reports that up to 65,000 residents were still without power as of...

WASHINGTON -- A plurality of likely voters in Tuesday's election thinks that climate change is happening as a result of human activity and supports the federal government acting to cut emissions, according to a HuffPost/YouGov survey released Monday.

Forty-four percent of respondents said they believe...

Climate activists in Michigan are hoping to pull off an upset in the House race that pits incumbent Republican Fred Upton against Democrat Paul Clements.

Upton, who chairs the House Energy and Commerce Committee, was considered a lock-in for re-election. But a recent poll conducted for the Clements campaign...

WASHINGTON -- The U.S. Postal Service has a reputation for being unstoppable. And while rain, snow and gloom of night can't stop the U.S. mail, the heat just might.

The Council on Environmental Quality, the White House office overseeing environmental issues, released plans on Friday from...