Your carbon footprint

A brilliant post by Ezra Klein, making clear why some sort of carbon tax (cap-and-trade, etc.) works miles better than expecting individuals to spontaneously monitor how much carbon their activities throw off into the atmosphere. The bottom line:

"You want a low-carbon lifestyle to be effortless, even natural. It can't be a complicated, virtue-based project. Emissions will start going down when we convince companies to change their price tags, not when we convince a fraction of Americans to change their lifestyles."