Why Al Gore isn't running for president

Here.

Excerpt:

I spent two hours one-on-one with Gore just before An Inconvenient Truth was released. Much of our interview focused on an irony that seems to have escaped many of those who have urged him to run for president: the last time Gore served in the White House, he failed to deliver much progress against global warming. During its eight years in office, the Clinton-Gore administration did not pass a single major law against climate change. It did sign the Kyoto Protocol, but only after watering it down with crippling loopholes, and then it chose not to seek Senate ratification of the treaty.