"The figure for consumers in the rest of the world is just 43%. Americans, largely because of how they drive and how they build and use their homes and offices, lead some of the most energy-intensive lives in the world.
'We in the U.S. have a much greater ability to influence this issue than perhaps people recognize,' says Jon Creyts, a McKinsey principal who assembled the numbers.
But harnessing people power won't be easy. There are big practical constraints, notably costs."