"The climate skeptics can finally get excited about the 2012 election: Rick Perry, their candidate of choice, is about to officially throw his hat in the ring."

"Atmospheric levels of methane, 20 times more powerful than carbon dioxide (CO2) at trapping heat, stayed steady for two decades to 2006 on wider fertilizer use to grow rice or a surge in natural gas demand, according to two separate studies in the journal Nature.

Climate researcher Fuu Ming Kai from the Massachusetts Institute of Technology's Singapore research center said in one study that methane output from rice fields in the Northern Hemisphere dropped during the period as fertilizers replaced manure and because of reduced water use.

"A devastating drought deepened over the last week in many areas, spreading through more of the Plains and going into the Midwest as triple-digit temperatures baked already thirsty crops and livestock."

"Only a year ago Russia was overwhelmed by an exceptional heat wave, triggering hundreds of fires that destroyed thousands of hectares of woodland. Burning peat bogs around Moscow stifled the city in a thick cloud of bitter smoke."

"A provision tucked into the debt ceiling legislation is rekindling debate about the nation's ability to pay for soaring catastrophe losses as coastal development and carbon dioxide emissions continue to rise.

The nation has struggled for years to find an effective way to help communities rebuild homes, businesses and infrastructure after natural disasters. Now, in a collision between downward federal spending and an upward presence of catastrophes, Congress is moving to pre-fund disasters.

"President Obama and truck makers reach agreement on fuel economy and pollution standards for big rigs, work trucks and other heavy-duty vehicles."

Texas' record drought will damage entire ecosystems for years to come.

"Carbon offsets neared all-time lows Friday, confirming their status as the world's worst performing commodity, as slumping demand meets rising supply of the U.N. instrument traded under the Kyoto Protocol."

"Major climate talks in South Africa at year-end will be unlikely to strike agreement on a new pact, but will be important in determining the shape of long-term efforts to tackle climate change, a senior U.N. climate official said on Tuesday."

The Natural Resources Defense Council, an environmental group, unveiled an online tool allowing users to look up the potential health effects of climate change by zip code.