Understanding Air Pollution Basics

What is the primary focus of air pollution regulation according to the U.S. Clean Air Act (CAA) of 1970?

• Water pollutants

• Six criteria air pollutants

• Soil pollutants

• Noise pollution

Which of the following is a natural source of sulfur dioxide (SO₂) emissions?

• Automobiles

• Power plants

• Volcanoes

• Factories

What is the main component of acid rain formed from sulfur dioxide in the atmosphere?

• Nitric acid

• Hydrochloric acid

• Sulfuric acid

• Acetic acid

Which gas is primarily responsible for the formation of ground-level ozone?

• Carbon monoxide

• Nitrogen oxides

• Methane

• Hydrogen

What is the primary health impact of carbon monoxide (CO) on the human body?

• Enhances oxygen transport

• Interferes with oxygen transport

• Increases blood pressure

• Reduces blood sugar levels

Which of the following is a secondary pollutant formed by chemical reactions in the atmosphere?

• Lead

• Smog

• Particulate matter

• Carbon monoxide

What is the primary source of airborne lead before the 1970s in the U.S.?

• Lead-based paint

• Lead plumbing

• Leaded gasoline

• Industrial emissions

Which atmospheric condition can lead to the accumulation of pollutants at ground level?

• Atmospheric inversion

• High wind speeds

• Low humidity

• Heavy rainfall