Moon walker, climate change denier

The twelve men who walked on the Moon are heroes. I have no doubt in my mind about that: the risks they took to stand on the surface of another world were fiercesome, and no matter what their fortitude is not in doubt. I've met many of them at various meetings, and quite liked them. But that doesn't make them infallible, of course. I've written about Apollo 14's Ed Mitchell diving headlong into antiscience (as well as here, here, and here) for example. And now I fear I must add Apollo 17's Harrison Schmitt to the list. I hate to do this, since he is an advocate for space travel and was the only classically-trained scientist to walk on the Moon (he's a geologist). However, he's a climate change denialist. And while everyone is entitled to their opinions, facts are not negotiable. And this is now doubly important since Schmitt ...