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?

I drove from Minneapolis to Minot, North Dakota, this year as a late spring snowstorm was brewing. Interstate 94, near the state line, closed down and the two lane highways and farm roads snaking westward were covered in hard ice and occasional, demonic flurries of drifting snow. I concocted a route around the storm with some helpful farmers at a gas station. My car limped west then north, west then north, on a maze of empty back roads.