Let the games begin. This summer's Olympics in London will include an epic contest in the public relations arena.

"President Barack Obama says the amount of money poured into fighting the scientific consensus on climate change will push the issue into the presidential campaign."

"In an interview with Rolling Stone published Wednesday, Obama also says he's worried about the lack of international progress to address global warming and believes that is tied to frustration with the Keystone XL pipeline.

"The Interior Department's inspector general appears likely to join the growing scrutiny over whether the National Park Service falsified data in an environmental review of a California oyster farm."

"Barack Obama has launched a new green re-election site hoping to make up with environmental voters ahead of next November's vote."

"The National Oceanic and Atmospheric Administration has been running its Wind Profiler Network for 20 years, using more than 30 radar sites to record hourly information on wind conditions from the ground up to 50,000 feet."

"The Chesapeake Bay Foundation and other environmental groups have urged a Pennsylvania federal judge to dismiss a lawsuit challenging the federal government's plan for reducing pollution fouling the estuary."

"COATZINTLA, Mexico — For seven decades, Pemex, Mexico’s state-owned oil monopoly and a mainstay of the government’s revenue, regulated itself — which is a polite way of saying it could do pretty much as it pleased."

"SAN DIEGO — There are accusations of conspiracies, illegal secret meetings and double-dealing. Embarrassing documents and e-mails have been posted on an official Web site emblazoned with the words 'Fact vs. Fiction.' Animosities have grown so deep that the players have resorted to exchanging lengthy, caustic letters, packed with charges of lying and distortion. And it is all about water."

"Hockey sticks and brawls aren't just for NHL playoff games. Climate scientist Michael Mann has the scars to prove it. But along the way he has picked up some fans as well."

The American Legislative Exchange Council -- ALEC -- has for decades worked to fight protection of public health from environmental threats. Funded with corporate money, the group has won non-profit tax status from the federal government even as it lobbies for industrial interests on an industrial scale. Now, because it backed the gun law that kept Trayvon Martin's killer from arrest, some large corporations are cashing out from ALEC.