Presidential science advisor John Marburger has been making some unusually strong and unambiguous statements lately about global warming. Here are my three theories about what could be going on:

  1. He’s off the reservation, sick of being bashed by the scientific community, and we’re soon going to see the phrase “more time with his family” near his name.
  2. It’s pure greenwashing, an attempt to demonstrate that, despite appearances, the Bush administration takes global warming seriously.
  3. Bush has decided that intransigence on warming is becoming a political liability, he’s going to make some splashy policy moves soon, and this is an attempt to soften the ground and prepare his supporters.

Which do you think it is?