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However, it is a very mature branch of science. There remains plenty of room for debate within it, but that debate is the province of educated, informed, sober individuals.

It is not the province of people who start using blatantly inflammatory language such as fraud, activist, Scare-with-a-capital-S right out of the gate. That is the province of knee-jerk ideologues and cranks.

The main thing people who approach the subject in such a manner have to teach us about the science, is why refereed discussion has become such an integral part of the scientific process.

Global climatology is, at least, extensively peer reviewed unlike the musings of random people on the internet.

It's very easy to earn a paycheck as a climatologist by denying global warming. The oil companies will be thrilled to fund your research. Exxon has done quite a bit of that.