Group Questions Level of Energy Use at Gore Home

"As the spokesman of choice for the global warming movement, Al Gore has to be willing to walk (the) walk, not just talk the talk, when it comes to home energy use," said Drew Johnson, president of the Tennessee Center for Policy Research, identified as a free-market think tank.

Gore's power bill shows, however, that the former vice president may be doing just that.

Gore purchased 108 blocks of "green power" for each of the past three months, according to a summary of the bills.