People need to have some hope. We imagine that we never solve anything, that we have all these horrific problems and they're just getting worse and worse and worse... But it's really important to go back and look at how much we succeeded in the past and what are the common threads of those successes.
The chemical companies' pushback to reining in CFCs is arguably minimal compared to resistance from oil and gas companies to reducing greenhouse gas emissions. And the ozone issue didn't have quite the same fervent political and polarized dissent from the public around it.
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