The Rev. Al Sharpton and Pat Robertson are sitting on a couch and in walks Al Gore. This isn't a joke. It's the plot of a new commercial in the former vice president's fight against global warming. Gore and his nonprofit agency, the Alliance for Climate Protection, are pitting odd couplings - think Sharpton and Robertson - in a series of public-service announcements to draw attention to the environment. The $300 million campaign is expected to launch next week, CBS News reported. Gore talks up his views in a "60 Minutes" interview set to air Sunday.