Staggerwing
That’s because the article I got it from was dealing with man made air pollution and water pollution. In regards to pollution caused by nature, the problem I have with this idea is that the Earth can cope with natural pollution and has done so since its creation. The Earth though can’t cope with man made pollution and in some parts of the world neither can we. You have only got to be in Hong Kong when the prevailing winds are coming in from the North, bringing all the crap down from China to know what I am talking about.
