Julie Kelly: The topic of man-made global warming from fossil fuels is highly contested, in part because one side claims that "the science is settled" and blocks input from people with differing views. The discussion of the influence of CO2 from fossil fuels has demonstrated incredible lows in science, attempts to manipulate and control science, and very unprofessional statements by people who are not experts in atmospheric science. This article shows who might be called a climate change denier and why.