Context is everything - Charlie Stross
The short version of the environmentalist value proposition is: don’t shit in your own back yard. Ecosystems are complex and exhibit non-linear behaviour; it’s a bad idea to disrupt the natural balance, lest we find ourselves suffering from crop failures due to pollinator die-offs, for example. And because this is a complex, knotty, gnarly field of interdependencies, the precautionary principle should be applied: take disruptive action only with extreme caution.
http://www.antipope.org/charlie/blog-static/2012/10/context-is-everything.html#more