These threads get exasperating. You have a tough time finding ten credible climate scientists on the planet that don't agree that we have anthropogenic warming. It's not a lead pipe lock like gravity but there's virtually not doubt in the mind of real scientists. But every so often a fake scientist or just a jackhole like Donald Trump says Nahh ahhh! and round we all go again.
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“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman