The system of nature... tends to be self-balancing, self-adjusting, self-cleansing. Not so with technology (E.F. Schumacher)

The system of nature, of which man is a part, tends to be self-balancing, self-adjusting, self-cleansing. Not so with technology. 

E.F. Schumacher, Small is Beautiful, 1973

From: http://www.quotegarden.com/environment.html