GLOBAL WARMING

The world's oceans are turning acidic at what could be the fastest pace of any time in the past 300 million years, even more rapidly than during a monster emission of planet-warming carbon 56 million years ago, scientists said on Thursday.

Actress Lucy Lawless was one of seven arrested Monday in New Zealand for climbing the tower of a Shell-owned oil-drilling ship in an effort to prevent it from leaving port. The 43-year-old New Zealand native and the other Greenpeace activists climbed the tower early Friday in an effort to prevent the ship from departing. The Noble Discoverer was due to leave the port this weekend to explore oil wells in the Arctic for future drilling.

The prestigious California-based Pacific Institute climate research group has launched an investigation of its president and founder, Peter Gleick, after he admitted fraudulently obtaining documents from global warming skeptics challenging his work.

Faith has pervaded Rick Santorum's political career, informing his views on issues ranging from abortion to gay rights -- and also, it turns out, the environment.

The climbing oil prices could undermine the U.S. economic recovery and it is an extremely disturbing report for President Barack Obama as it could hurt his re-election chances.

A 2008 commencement speech by Rick Santorum reveals that the Republican presidential hopeful's religious views diverge from those of many in the U.S. electorate.

Rick Santorum defended comments he said about President Barack Obama's beliefs, saying Sunday he was criticizing his liberal world view rather than his religious ideology.

Republican presidential candidate has consistently denied the existence of anthropogenic climate change.

A Chicago-based think tank is working hard to make sure that kids grow up to become global warming skeptics, leaked documents show.

Katharine Hayhoe, a well-known Christian climate scientist, said politics, not theology, is the problem.

U.S. scientists using satellite data have established a more accurate figure of the amount of annual sea level rise from melting glaciers and ice caps which should aid studies on how quickly coastal areas may flood as global warming gathers pace.

In an effort to expose Planned Parenthood's advocacy of abortion by wholesale, Rep. John Fleming (R-La.) posted an article about a long-planned Abortionplex by the organization on Facebook. The only problem? His source was The Onion, a satirical news source, meaning everything in the incriminating piece was completely (and obviously) false.

Hayhoe said she has received threatening and intimidating e-mails after a conservative blogger posted her e-mail address on his Web site.

Mitt Romney, Ron Paul, Newt Gingrich and Rick Santorum tackled a broad range of foreign, domestic and social issues during last night's debate, from immigration law and foreign policy to Romney's link to Obamacare and whose wife would make the best first lady. Relive the highlights of the CNN Florida Republican debate, and get a rundown of the top quotes and biggest arguments of the night.

A weaker sun over the next 90 years is not likely to significantly delay a rise in global temperature caused by greenhouse gases, a report said Monday.

A huge pool of fresh water in the Arctic Ocean is expanding and could lower the temperature of Europe by causing an ocean current to slow down, British scientists said Sunday.

Humbled by a stunning loss in South Carolina, Mitt Romney said on Sunday he would release this week the tax returns demanded by rivals as he bids to regain the upper hand in the volatile Republican presidential race.

Humbled by a stunning loss in South Carolina, Mitt Romney said on Sunday he would release this week the tax returns demanded by rivals in his bid to regain the upper hand in the volatile Republican presidential race.

In case you missed the Republican presidential debate in Charleston, S.C., Thursday night, here are the highlights, from Newt Gingrich's opening tirade against moderator John King of CNN to Ron Paul's defense of leaving abortion laws to the states.

The global average temperature last year was the ninth-warmest in the modern meteorological record, continuing a trend linked to greenhouse gases that saw nine of the 10 hottest years occurring since the year 2000, NASA scientists said on Thursday.

Scientists have always known about invisible molecules called Criegee biradicals in the atmosphere, but now they know how they react with pollutants.