Former Florida Gov. Jeb Bush says he is "light green" on the environment and is skeptical that humans are causing global warming. [....]

Bush said those who advocate action to limit climate change are acting out of something like religious zeal.

"I don't think our policies should be based on emotion; they should be based on sound science," he said.

Rather than reducing oil consumption, Bush said the United States should focus on "energy security" - reducing dependence on oil imported from hostile or politically unstable countries by encouraging alternative fuels.