What type of pollution is more harmful?

One of the most harmful and irritating pollutants is sulphur dioxide, caused by any power plant that uses coal or oil as a fuel. Long term exposure is dangerous to people causing Asthma and other breathing problems. Acid rain is produced damaging rivers and streams. Carbon oxides are not so dangerous, but are the biggest group of pollutants. Human exposure causes the reduction of oxgen to the body and can cause death