Tennessee ? Al Gore, a leading voice in the fight against global warming, is being called a hypocrite by a conservative group that claims his Nashville mansion uses too much electricity.

A spokeswoman for Gore said the former vice president invests in enough renewable energy to make up for the home’s power consumption.

Gore’s documentary film “An Inconvenient Truth,” which chronicled his campaign against global warming, won an Academy Award on Sunday.

The next day, the Tennessee Center for Policy Research put out a news release saying Gore was not doing enough to reduce his own consumption of electricity. The group disputes whether global warming is a serious problem.

“We wanted to see if he was living by his own recommendations and walking the walk,” said Drew Johnson, president of the think tank, which pushes for conservative economic issues.