In 1975, legendary underground cartoonist R. Crumb published a piece entitled "Let's Talk Sense About This Here Modern America" in a magazine called "Arcade." In it, along with his usual rants about the decline and fall of the U.S. of A., he brought up a topic that not that many people thought about back then: global warming.
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You can see the full page where he talks about it
here.Funny how a dirty fucking hippie knew about this 32 years ago, but the ever-so-smart luminaries of the conservative movement are still pretending
it doesn't exist.