Piedmont Environmental Council - pecva.org - Ozone Pollution http://www.pecva.org/anx/index.cfm/1,394,html Exhaust from automobiles is the primary cause of ozone pollution and causes serious environmental and health problems. Piedmont Environmental Council - pecva.org http://www.pecva.org/anx/img/logo.gif http://www.pecva.org/anx/index.cfm/1,394,html Piedmont Environmental Council 60 en Ozone Pollution Exhaust from automobiles is the primary cause of ozone pollution and causes serious environmental and health problems. http://www.pecva.org/anx/index.cfm/1,394,1123,html