Cartoon Setting: Former Vice President Dan Quayle telling Elmer his thoughts on the environment problem.  They are in a polluted sky place that shows effects of climate change, global warming with desserts and global cooling with snow in the dessert.
Dan Quayle: “It isn’t pollution that’s harming the environment.  It’s the impurities in our air and water that are doing it.”
Elmer: (scratching his head and backside trying to understand this).
Caption: Elmer was a bit puzzled by Dan’s environmental comment.
NOTE:  This was a real quote.  You just can’t make this stuff up.