Air pollution

What year did the Clean Air Act pave the way for numerous efforts to improve air quality in the United States?

• 1990

• 1960

• 1970

• 1980

Which organization is required by the Clean Air Act to set air quality standards for hazardous air pollutants?

• CDC

• FDA

• WHO

• EPA

What are the six common pollutants in the atmosphere measured by the EPA?

• Particulates, Methane, Lead, Carbon Monoxide, Nitrogen Dioxide, Sulfur Dioxide

• Particulates, Ozone, Lead, Carbon Monoxide, Nitrogen Dioxide, Sulfur Dioxide

• Particulates, Carbon Dioxide, Lead, Nitrogen Oxide, Sulfur Dioxide, Ozone

• Particulates, Ozone, Lead, Carbon Monoxide, Nitrogen Dioxide, Carbon Dioxide

What has decreased due to stricter emissions standards and increased efficiency in vehicle engines?

• Number of vehicles on the road

• Vehicle emissions

• Fuel prices

• Traffic congestion

Which of the following has decreased due to new technologies in factories and power plants?

• Carbon monoxide emissions

• Nitrogen dioxide emissions

• Sulfur dioxide emissions

• Mercury emissions

What has decreased due to decreased power plant emissions?

• Acid rain

• Greenhouse gas pollution

• Pollution-caused haze

• Ozone holes

What continues to shrink as a result of banning the use of CFCs?

• Carbon monoxide levels

• Lead emissions

• The ozone hole

• Particulates in the atmosphere

What has decreased in cities and wilderness areas due to efforts to improve air quality?

• Population density

• Pollution-caused haze

• Humidity

• Temperature

What has decreased due to the Clean Air Act, leading to a decrease in health problems?

• Risk of earthquakes

• Risk of hurricanes

• Risk of premature death

• Risk of tornadoes

What is the main purpose of the Clean Air Act?

• To promote greenhouse gas emissions

• To set air quality standards

• To increase air pollution

• To encourage vehicle emissions