CLINTON ON CLIMATE.

But in many ways, the Clinton plan is the most aggressive and most detailed, probably an advantage of being the last out of the gate. The Edwards plan proposed a transition period to auctioning off credits in cap-and-trade, and both Obama and Clinton responded with a call for immediate, 100 percent auction. Edwards called for one million new green jobs, Obama one-upped him with "millions," and now Clinton's plan calls for 5 million. Edwards and Obama pledged to cut oil imports by 7.5 million and 10 million barrels of oil a day, respectively; Clinton says she'll cut imports two-thirds, or by more than 10 million barrels a day. Obama and Edwards mentioned energy efficiency; she made it a central component of her plan, promising a 20 percent cut in national energy use from projected levels by 2020 through efficiency alone. And while all three plans call for significant increases in automobile fuel efficiency standards, Clinton's is particularly interesting in that it out-does anything she's supported previously, pledging to raise CAFE standards to 55 miles by 2030, and create a $20 billion "Green Vehicle Bonds" program to help U.S. automakers update their plants to reach that goal.