From a piece by Roy Spencer in TCS, A Little Eco-Nomics Never Hurt:
The dangerous illusion underpinning many environmental efforts is that it is both possible and preferable to keep pushing toward a 100 percent clean and safe existence. Those of us who try to point out that there are practical limits to cleanliness and safety are immediately branded as shills for big business. Meanwhile, environmentalists and politicians get to hold the high ground of altruism and concern for the public's interest.
P.J. O'Rourke once said, "Some people will do anything to save the Earth...except take a science course." To that I would add, "...or a basic economics course". If for a reasonable cost we can remove 98 percent of the contaminants in our drinking water and make it quite safe, is it then a good idea to spend ten times as much to push that purity from 98 percent to 99 percent?
In the real world, there are only limited resources to accomplish everything we want to do, and resources diverted to wasteful ends are no longer available to tackle more pressing problems. Only in the imaginary world of the environmental lobbyist, pandering politician, or concerned journalist is it a public service to keep pushing toward 100 percent purity.
