According to a New York Times editorial this week, out of around 20 Republican senatorial candidates "with a serious chance of winning next month," only one believes that humans are responsible for climate change.
(If this doesn't bother you, go ahead and move along. But know that you're making me sad.)
If it worries you that soon there will be even more people in the senate who believe that climate science is "malarkey," here is a handy toolkit of responses you can give to climate change deniers. Playing the role of the deniers will be actual commenters who posted replies to the Times editorial. (In the interest of brevity, most comments have been abridged.)