Pieces of shit will do that
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Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.
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So he’s a spineless weasel that will do or say anything for power. That tracks.
I sincerely doubt he changed his opinion. More likely he still feels that society has a climate problem. But since he's rich, he's not part of society, at least in his mind, I suspect.