Carbon emissions as a growth industry? You bet. It's already a big deal and it's bound to become big money. Find out the what, how and when.

The weaker dollar has been sending commodity prices higher and while most of the energy sector has moved significantly up as well, natural gas has stayed relatively cheap. How can investors profit from natural gas?

NRG Energy said Monday that it bought offshore wind developer Bluewater Wind, as the power company looks to bolster its supply of renewable energy.

A New Jersey candy factory that produces M&M's flipped the switch Monday on a new solar array that provides clean energy.

Next month's climate summit in Copenhagen must produce a substantial agreement, and failure would set back by years efforts to fight global warming, German Chancellor Angela Merkel said Tuesday.

David Crane, CEO of NRG Energy, is pushing for climate change legislation on Capitol Hill.