What term refers to harmful substances in the air from vehicles or industry?

What term refers to harmful substances in the air from vehicles or industry?

• A. Emissions
• B. Smog
• C. Particulates
• D. Air Pollution

Answer: (D)

Air pollution is the presence of harmful substances in the air caused by human activity such as vehicles and industry. It’s the broad term that covers all pollutants in the air, from gases to fine particles. Emissions refer to the release of pollutants themselves, not the condition in the air. Smog is a specific type of air pollution that shows up as hazy air due to chemical reactions, and particulates are tiny particles that are one category of pollutants. Because the question points to the overall harmful substances in the air from human activity, air pollution is the most appropriate and comprehensive term.

Air pollution is the presence of harmful substances in the air caused by human activity such as vehicles and industry. It’s the broad term that covers all pollutants in the air, from gases to fine particles. Emissions refer to the release of pollutants themselves, not the condition in the air. Smog is a specific type of air pollution that shows up as hazy air due to chemical reactions, and particulates are tiny particles that are one category of pollutants. Because the question points to the overall harmful substances in the air from human activity, air pollution is the most appropriate and comprehensive term.