Frontline

Heat

For years, big business -- from oil and coal companies to electric utilities to car manufacturers -- have 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, fundamentally transforming the politics of the debate. Producer Martin Smith travels the globe to size up the climate problem firsthand and to test what big business is really doing to solve one of the most urgent issues of our time.