1 Which of the following air pollutants primarily contributes to the formation of photochemical smog?1 markSulfur dioxide (SO2) Particulate matterNitrogen oxides (NOx)Carbon monoxide (CO)Q2How does the presence of particulate matter in the air impact human health and the environment?1 markParticulate matter increases the risk of respiratory diseases and cardiovascular problems.Particulate matter enhances the ozone layer and protects against harmful UV radiation. Particulate matter reduces the formation of acid rain and its harmful effects on ecosystems.Particulate matter has no significant impacts on human health or the environment.Q3Which air pollutant is primarily responsible for the formation of acid rain?1 markCarbon monoxide (CO)Sulfur dioxide (SO2)Volatile organic compounds (VOCs)Lead (Pb)Q4Which of the following sources contributes the most to indoor air pollution?1 markIndustrial emissionsVehicular exhaustAgricultural activities   Indoor combustion (e.g., cooking, heating)Q5How can reducing individual reliance on private vehicles help mitigate air pollution?1 mark   Private vehicles are a significant source of nitrogen oxides, contributing to smog formation.Private vehicles have no impact on air pollution; other sources are more significant.Private vehicles are a major source of indoor air pollution in residential areas.   Private vehicles are primarily responsible for the emission of greenhouse gases.