Palin: of course this is real, but I don't attribute it to human activity alone, but let's not argue about the causes, let's work toward a solution. She proposes a broad range of solutions including foreign policy to reduce global pollutions.

Biden: attacks the drill baby drill idea.

Palin says that drilling is about domestic sources of energy. She claims that this is a part of an all-of-the-above approach.

Biden: McCain does not have a track record of supporting alternative energies.