OnPoint looks at the developing market for C02 emissions. Guests Daniel Chartier, president of the Emissions Marketing Association, and Rob Bradley, senior associate with World Resources Institute, talk with senior reporter Brian Stempeck about how companies are responding to Europe's imposition of CO2 emissions limits. Key questions include: Will Canada and states from the US join Europe's CO2 market? How are US multinationals responding? Who is best -- and least -- prepared to deal with trading C02? What's the price for a ton of C02 and how much is being traded?