New markets open for carbon emissions, but are people buying it?

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Today marks a new year and a new chapter in the global battle to combat carbon emissions. Utility companies across the eastern seaboard are lining up for the rights to carbon emissions. The new market called The Regional Greenhouse Gas Initiative (REGGI) is the beginning of a global trend in green politics. To explain all of this is Edward McBride, the energy and environment correspondent for The Economist, he joins John and Adaora from London to answer what is the price of used carbon?