Nov. 6: Rachel Maddow talks to former Vice President Al Gore about how American legislators who deny global warming will be received at the climate change convention in Copenhagen. (Other)

Nov. 5: Southern Maryland's Mattawoman Creek, which feeds the Chesapeake Bay, serves as a good example of how to keep a waterway healthy. (NBC News Web Extra)

Nov. 5: A controversial road project could lead to damage of Mattawoman Creek. NBC's Blayne Alexander reports. (NBC News Web Extra)

Nov. 6: TODAY's Meredith Vieira talks to famed naturalist Jeff Corwin about his new MSNBC special, "Future Earth: 100 Heartbeats." (Today Show)

Nov. 4: Former Vice President Al Gore joins Rachel Maddow to talk about his new book and his concerns about climate change. (Other)

The current Secretary of Energy is also a Nobel Laureate and former physics professor at UC Berkeley, and a self-described 'energy conservation nut.'

The rapidly changing landscape of environmental, social, and governance (ESG) research providers received another major update this week as RiskMetrics Group announced the acquisition of KLD Research & Analytics. The acquisition, which has been widely anticipated for a month, follows RiskMetrics' purchase of Innovest Strategic Value Advisors, like KLD a provider of ESG research, in February.

Nike will debut a new collection of athletic footwear Saturday made with environmentally preferred materials. A portion of revenue from the N7 line will support Native American youth sports through the N7 Fund.

Though a giant in the buildings and automotive industries, Johnson Controls Inc. was long considered a quiet company — seldom a major presence outside its lines of business. That's changing as the firm increasingly raises its voice and its profile to spread its mantra of "Efficiency Now."  

One year after setting a goal to cut corporate emissions by 8 percent before 2013, Diversey CEO today announced the company had already surpassed that target, and upped the goal to a 25 percent reduction in the same time frame.