dangerous sulfur dioxide so2 in the air - concept with chimney, gas emission and text - sulfur dioxide is a major air pollutant

sulfur dioxide sulphur so2 acid rain acidic gas flue gases toxic emissions fumes air pollution smokestack pollutants pollutant combustion chimneys concepts text chemistry industrial activity petrol refineries chemical manufacturing industries poisonous midair industry chimney smoke pipe factory atmosphere airborne contamination message concept chemicals environmental damage issues cancer