"The very concept of pollution is anthropocentric and it may even be irrelevant in the Gaian context. Many so–called pollutants are naturally present and it becomes exceedingly difficult to know at what level the appellation ‘pollutant’ may be justified."
"When urban industrial man does something ecologically bad he notices it and tends to put things right again. The really critical areas which need careful watching are more likely to be the tropics and the seas close to the continental shores. It is in these regions, where few do watch, that harmful "