Writing for Climate Progress, Joe Romm identifies three levels of Climate Science Denier:
- CSD1: A climate science denier of the first kind simply denies basic climate science, that, say the Earth is warming or that CO2 is a greenhouse gas.
- CSD2: Climate science deniers of the second kind say that they accept basic climate science — so they aren’t ignored by the media — but then just assert that it isn’t going to be a big deal. They usually latch on to some tiny subset of the recent literature to make this argument.
- CSD3: A CSD3 says that they accept basic climate science but then starts making arguments that effectively deny that science. Indeed a CSD3 who is rhetorically clever often says he or she used to believe in climate science, but then supposedly looked into the matter closely and were shocked, shocked to learn that they had been misled.
I don’t know that Romm created these distinctions himself, but this is the first place I’ve seen them laid out.