I followed the global warming discussions, back when it was a true controversy among climatologists, probably from about 1980 to some time in the 90s -- casually, not being invested one way or the other -- picking up Scientific American in the doctor's office or when I was in a library. Like other scientific debates it went from "Hey, some people think this and have this evidence" to "Looks rather convincing" to Yeah, but ..." to "Yeah, it's probably true" to "Everybody who can read the literature is convinced". It was a normal scientific debate, it went from speculations to apparent solidity much the same way the continental drift debate went a couple of decades earlier. Now I did, just the other day, see a guy in a ballcap that "Stop Plate Tectonics", but I suspect he was being ironic. Climate change didn't seem particularly political back then. When did it turn into the supposed giant conspiracy?
Hal Lewis may be quite competent for an ex-physics professor of no great distinction who's been retired probably 20 years, or he may be losing his marbles. It's not uncommon at that age for even truly brilliant people to get somewhat obsessed with how bizarrely different the world looks from when they were young and think it's all going to Hell in a hand-basket. Hell it's hard for me to think about "hooking up", and it pains me to hear someone say "one of the only" -- an expression people didn't use 15-20 years ago (It is tending to replace "One of the few").
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3 years ago