This article from 1990 in the NYT tries to account for the cost of banning CFC's[1]. At worst it's a few hundred billion USD. We've spent way more than that on

This article from 1990 in the NYT tries to account for the cost of banning CFC's[1]. At worst it's a few hundred billion USD. We've spent way more than that on CO^2 via the Kyoto accords etc. Of course the problem isn't solved, but that's because it's a way bigger problem. We've acted even more on CO^2 than CFC's, but the problem of CFC's was much smaller and easier to solve. 1. http://www.nytimes.com/1990/07/17/science/grappling-with-the-cost-of-saving-earth-s-ozone.html?pagewanted=all http://www.nytimes.com/1990/07/17/science/grappling-with-the...