Ceres' David Gardiner examines how companies prepare for carbon constraints

From measuring greenhouse gas emissions to improving energy efficiency, many U.S. companies are already acting with future climate change regulations in mind. But are U.S. businesses doing enough to prepare for a carbon-constrained economy? Ceres -- a coalition of investors and environmental groups -- recently ranked energy companies, automakers, chemical manufacturers and other businesses based on what they are doing with regard to climate change. During today's OnPoint, Ceres senior adviser David Gardiner discusses the group's report. Gardiner, former director of the White House Climate Change Task Force under President Clinton, also talks about what he expects to see from Congress on climate policy this year.