For the 1,000th time - you can have a difference of opinion over things that are arguable - politics, religion, which sauce is the best (sriracha) You can't have a difference of opinion over scientific fact You're just wrong
Climate change has indeed been demonstrated. The Earth is warming. Whether this is entirely anthropogenic, or what we can do, are potentially issues to argue about
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There are reasons to take Attenborough with a grain of salt, too. E.g. his claims on melting ice and polar bears have been shown to be bogus. Agree wholly with your last sentence.

End of conversation
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