I would like to add one observation I have .Not even on poultry pollution.But how many times have you seen , while pulling into a parking spot, or along a public parking lot, pools of oil, , antifreeze and other auto related fluids.Do you think this stuff just drips in parking spots?It is everywhere.Where ever an auto has been operated you see this.Our highways are our biggest sources of oil based pollution.Have you noticed how slick the intersections are when it first rains? And no its not all because oil comes out of the asphalt in the heat.I know people dump used oil on the ground and on dirt roads to keep down the dust , And they are a problem, but they arent even a tiny bit responsible for all the problems. We as auto owners arent aware of the trouble or we might be more responsible.