"Wal-Mart Stores Inc plans to massively cut greenhouse gas emissions from its global supply chain within five years -- an effort the retailer said is equivalent to taking more than 3.8 million cars off the road for a year."

"An iceberg the size of Luxembourg knocked loose from the Antarctic continent earlier this month could disrupt the ocean currents driving weather patterns around the globe, researchers said Thursday."

"Senate Majority Harry Reid (D-Nev.) has instructed Sen. John Kerry (D-Mass.) to produce a revamped climate bill as soon as possible, according to sources, a task Kerry intends to accomplish within two weeks."

A new report from the USGS looks at the potential for uranium mining in the West -- inlcuding one site in the Grand Canyon watershed area.

While many scientists think global warming will bring more intense hurricanes, a new scientific paper suggests that the climate system may also work the other way around. Authors looking at data from the Pliocene era say hurricanes may have created a permanent El Nino condition that enhanced warming.

"A Silicon Valley company is claiming a breakthrough in a decades-old quest to develop fuel cells that can supply affordable and relatively clean electricity. Google, Bank of America, Wal-Mart and other large corporations have been testing the devices, which will be formally introduced on Wednesday."