Or maybe just turn up the room's CO2 level to 450 ppm?

New movie: "The Steam Experiment"

The film, starring Val Kilmer, Armand Assante and Eric Roberts, will be filmed all over town - downtown, along the Grand River and at The Grand Rapids Press. According to sources, the film involves a scientist trying to prove his theories on global warming, locking people into a steam room and threatening to turn up the heat if the local paper doesn't tell his story.