system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why people deny climate change? What are their arguments?

With the GBR news on the front page currently, I learnt that Greg Hunt (Australian environment minister) is a climate-change denier. I'm currently 17 and have always accepted climate change and have never really thought about why people deny it.
gpt
It's a very complex bit of science, that requires a background in climate science to truly grasp the studies that prove man made climate change.

Basically, the Earth has been warming and cooling for its whole history, so it's not just enough to show that the world is warming up, as that could be completely natural. You have to show that it's heating up faster than it should be, which involves looking at hundreds of thousands of years worth of climate data, gathered from multiple partial sources, like tree rings, ice cores, and geologic samples. You also need to account for other man made events, such as the heat island effects of cites, and adjust the data accordingly.

So you've got a very complex science, with plenty of places to manipulate the data, either accidentally or intentionally. Combine that with the idea that it's presumably easier to get funding for more research if your data proves climate change, and you can see why someone might be a little sceptical. 

Combine all of the above with a general distrust of the left, and you can see why someone might just discredit the entire argument for climate change on the idea that it's just a conspiracy cooked up by the left to shut down oil companies and the like.