Although the TEL seems inexcusable, I&#x27;m not convinced that the second point about CFC&#x27;s is fair.<p>Yes, they destroy the ozone layer, but that wasn&#x27;t known at the time Midgley invented them, and they replaced refrigerants that were corrosive and poisonous.<p>I also question this line: &quot;Beneficial ozone is not terrible abundant, however. If it were distributed evenly throughout the stratosphere, it would form a layer just 2 millimeters or so thick.&quot;<p>How would evenly distributed ozone create a layer? Something seems wrong with the research here.