"Environmental campaigners planted trees, collected rubbish and rallied against pollution on Sunday for what organisers aimed to make the world's biggest day of climate-change activism."

"World leaders have snubbed the next round of international climate change negotiations in Mexico next month amid fears the talks will collapse."

"California voters are remaining true to one stereotype -- their commitment to the environment. A measure to suspend the state's vanguard climate change law is heading for failure, by a margin of 49 percent to 37 percent, because voters see the law doing more economic good than harm, a Reuters/Ipsos poll released on Tuesday showed."

"The United States and EU said on Wednesday that U.N. climate talks were making less progress than hoped due to rifts over rising economies' emission goals, while China pushed back and put the onus on rich nations."

"The sun may warm the Earth more during waning solar cycles, new satellite data has shown, turning scientific understanding on its head and helping to explain extreme local weather patterns, scientists said on Wednesday."

"The solar panels are coming back! A month after environmentalist Bill McKibben brought one of the original Carter-era solar panels to Washington, the White House said it is putting new panels on the White House residence."

"The University of Virginia and an embattled climate scientist said Monday that it would continue to fight state Attorney General Ken Cuccinelli II's efforts to obtain documents related to a climate scientist's work, just hours after Cuccinelli reissued a civil subpoena for the papers."

"Republicans running for governor in a handful of states could block, or significantly delay, one of President Obama’s signature initiatives: his plan to expand the passenger rail system and to develop the nation’s first bullet-train service."