Cartoon character Al Gore in Costa Rica: "more nations need to rely on wind and solar power"

Al Gore talks climate change in Costa Rica / Top Story / News / Costa Rica Newspaper, The Tico Times

"...governments around the world, with the exception of Costa Rica and a few others, are yet to acknowledge this issue as they should,” the former vice president said.

Throughout his presentation, which included a photo slide show and several graphs detailing the world’s increase in temperature and erratic change in weather patterns, Gore was exceedingly complimentary of Costa Rica’s effort to curb climate change and its efforts to be a carbon neutral nation by 2021. Early in his speech, Gore referred to Costa Rica as a “hero among nations.”

“I am filled with admiration for your country and I hope that you know I am not saying so just to flatter my hosts or all of you here,” he said to the crowd of about 400 people. “But I hope you fully understand and accept that the rest of the world has an image of this country as a true leader in the community of nations. It is in pursuit of peace and peacemaking, the elevation of universal human values, the prioritization of education over violence and warfare, and the commitment to sustainable development and the Earth’s ecological system. Costa Rica truly is a hero among nations.”

The presentation also included a picture of the November 2010 landslide in San Antonio de Escazú, west of San José, which killed 27 people. Gore attributed many of the heavy rains that occurred throughout the world last year to the effects of global warming and increased international temperatures. He also showed photos of heavy rains in Colombia, Mexico, India, Pakistan and his hometown of Nashville, Tennessee. He said that the rains that occurred in Nashville were considered by scientists to be a “once in a thousand year rainfall.” Gore then quipped that “once in a thousand year rainfalls” have recently been occurring once every few years.
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Gore also said that in 15 to 20 years, smaller and safer nuclear reactors could be available and result in more reliance on nuclear power. He followed the comment by saying that more nations need to rely on wind and solar power, including Costa Rica.

Question: If entire nations should "rely" on wind and solar power, why doesn't Gore rely on wind or sun to power any of his homes or cars, or the airplanes on which he travels the world?