The correct answer
23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTubeSulphur-dioxide is a gas that is produced when fossil fuels such as coal and oil are burned. It is a major air pollutant that can cause a variety of health problems, including respiratory problems, heart disease, and cancer. Sulphur-dioxide can also damage crops and forests.
Carbon dioxide is a gas that is produced when plants and animals breathe. It is also produced when fossil fuels are burned. Carbon dioxide is not as harmful to human health as sulphur-dioxide, but it is a greenhouse gas that contributes to climate change.
Oxygen is a gas that is essential for life. It is not an air pollutant.
Nitrogen is a gas that makes up about 78% of the air. It is not an air pollutant.
Sulphur-dioxide is the most significant air pollutant because it is a major cause of respiratory problems, heart disease, and cancer. It can also damage crops and forests.