Nitrogen dioxide (NO2) is a reddish-brown gas that has a pungent, acrid odor. It is a highly reactive gas that can irritate the eyes, nose, and throat. NO2 is a major air pollutant that is produced by the combustion of fossil fuels.
Sulfur dioxide (SO2) is a colorless gas that has a sharp, suffocating odor. It is a toxic gas that can cause respiratory problems, including asthma attacks. SO2 is a major air pollutant that is produced by the combustion of fossil fuels, especially coal.
Sulfur trioxide (SO3) is a colorless gas that has a pungent, choking odor. It is a highly reactive gas that can cause severe burns to the skin and eyes. SO3 is a major air pollutant that is produced by the combustion of fossil fuels, especially coal.
These three gases are all harmful to human health and the environment. They can cause respiratory problems, heart disease, and cancer. They can also contribute to the formation of smog and acid rain.
