In other words, for the same present cost, more than three times as much could be cut from the world's total CO2 emission by waiting a couple of decades.

ECONOMIST: A cooling off period

Industrywide minimums are set to step up gradually, from a total of 250 emission-free vehicles between 2005 and 2009 to 50, 000 between 2015 and 2017.

FORBES: Hot Air