Everyone know that pollution is a big problem at industrial ages. A whole army of workes do nothing except clearing the pollution. Recently I discovered a small trick that allowed me to reduce polluting to reasonable numbers. I tried to discover Ecology BEFORE Sanitiation. The result was impressive! Four workers were enough in order to control the pullution at entire continet (map:HUGE, civ:Non-undustrial). Of corse, I had some degrade in production and money but that was worth of it. I wonder, why only now, after 3 years of playing Civ3, I have came to this idea?