Do you not think that it's a bit silly to judge the possibility of human causation on a timescale of the entire history of Earth? After all, our ancestors have only been around for about six million years, the modern form of humans only evolved about 200,000 years ago, civilisation as we know it is only about 6,000 years old, and industrialisation started in the earnest only in the 1800s [1], whereas Earth has been around for about 4.543 billion years [2]. It therefore shouldn't be at all surprising that it would be the first time in the history of Earth that humans caused Earth to warm, given that that would have been impossible for a period spanning billions of years, and then, even since our existence, our contributions would have been on a much less significant scale until at least the last few hundred years. — Sapientia
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