Question

What is the main cause of air pollution?

• A. Plant respiration
• B. Excessive noise from machinery
• C. Underground water contamination
• D. Emission of harmful gases from vehicles and industries

Answer 1

Answer:

D. Emission of harmful gases from vehicles and industries

Air pollution is caused by the emission of harmful substances into the air. The main cause of air pollution is the release of harmful gases from vehicles and industries. The primary gases responsible for air pollution are carbon dioxide, carbon monoxide, sulfur dioxide, and nitrogen oxide.