Most of us are trying to "go green", but it is easy to feel overwhelmed by the global scope of the issues of climate change. HEAT, a special two-hour FRONTLINE episode that reveals what businesses across the world are doing and not doing to protect the environment airs tonight at 9pm.

For years, big business - from oil and coal companies to electric utilities to car manufacturers - has resisted change to environmental policy and stifled the debate over climate change in America and around the globe. Now, facing rising pressure from governments, green groups and investors alike, big business is reshaping its approach to the environment.Correspondent Martin Smith investigates the ways that companies are repositioning to help them prosper in a radically changed world.Watch the trailer  and don't miss this special program Tuesday night at 9.  Donate Now - Keep programs like this on the air! Tell your friends and family about this special.  Tell a Friend