U.N. Climate Summit Leaves Large Carbon Footprint

Leading by example. CBS News

To hear world leaders and others addressing the United Nations Summit on Climate Change, the threat could not be more real and the need more urgent to reduce emissions of greenhouse gases.

But in stark contrast to the earnest statements is the carbon footprint associated with their gathering.

It happens every autumn: midtown Manhattan becomes the motorcade capital of the world. Each foreign leader in town has a convoy of vehicles. Some of them, like President Obama's motorcade, are 20-to-30 vehicles in length. It's so long - it seems that when the front of it reaches the U.N., the back end is still back at his hotel.