...as you can see the big white (most are black) vent blows the air down instead of up and out of the neighborhood. That air is from furnaces that utilze between what 400-500 houses use in natural gas, plus all of the pollutants coming from the cleaning fluids of the parts, the cutting oils and whatever else is on the items when it gets heated up....it goes from the furnaces into my childrens' lungs!!!!! 
