Why We Often Worry Too Much, and Sometimes Not Enough

http://dotearth.blogs.nytimes.com/2012/02/27/eco-anxiety-examined/

There are plenty of very real environmental dangers to worry about, and all of them — including mercury, pesticides and hazardous waste — merit some concern and precaution; but that concern should be measured, commensurate with the actual danger, as best we understand it.