There are certainly individual claims of climate change that are probably not entirely correct. That's how science works - hypotheses are made, experiments run, some are disproved and others continue to stand. Anyone who works to disprove those claims runs the risk of being tagged a denier due to the actions and motives of those who came before them. I don't have much sympathy.

EDIT: Apparently this isn't even true. Individual claims are rebutted all the time and the theory is adjusted according to https://news.ycombinator.com/item?id=22050728. I'll leave my original comment up for posterity.