Lenard Nimoy was a paid ex cowboy actor who died of lung cancer from smoking.
Ronnie Regan was an actor and the right had been looking for another actor to play president but had to settle for Trump.
In the 1970's a few scientists thought dirty air would win out over CO2 warming. So we cleaned up the air.
Add in that the general public conflates Nuclear winter with that, cause you can't fix stupid fed by proper gander.
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skepticalscience.com]