To protect human health

To protect the environment

To promote economic growth

To improve air quality

Environmental Protection Agency (EPA)

National Oceanic and Atmospheric Administration (NOAA)

Department of Energy (DOE)

Department of Transportation (DOT)

Particulate matter (PM)

Ozone (O3)

Carbon monoxide (CO)

Nitrogen dioxide (NO2)

Sulfur dioxide (SO2)

Lead (Pb)

A set of air quality standards established by the EPA

A set of air quality standards established by the World Health Organization (WHO)

A set of air quality standards established by the European Union (EU)

A set of air quality standards established by the United Nations (UN)

Primary standards and secondary standards

Short-term standards and long-term standards

Indoor standards and outdoor standards

Mobile source standards and stationary source standards

Primary standards are designed to protect human health, while secondary standards are designed to protect the environment.

Primary standards are more stringent than secondary standards.

Primary standards are based on short-term exposure, while secondary standards are based on long-term exposure.

Primary standards are set for outdoor air, while secondary standards are set for indoor air.

A federal law in the United States that regulates air pollution

A federal law in the United Kingdom that regulates air pollution

A federal law in the European Union that regulates air pollution

A federal law in the United Nations that regulates air pollution

Setting air quality standards

Regulating emissions from stationary and mobile sources

Providing funding for air pollution control programs

All of the above

A measure of air quality based on the concentration of pollutants in the air

A measure of air quality based on the number of people who are sick from air pollution

A measure of air quality based on the amount of money spent on air pollution control

A measure of air quality based on the number of days with air pollution

Good, moderate, unhealthy for sensitive groups, unhealthy, very unhealthy, and hazardous

Good, fair, poor, very poor, hazardous, and extreme

Good, moderate, unhealthy, very unhealthy, and hazardous

Good, fair, poor, very poor, and extreme

To inform the public about air quality

To help people make decisions about outdoor activities

To help government agencies take action to reduce air pollution

All of the above

The cost of air pollution control

The difficulty in regulating emissions from mobile sources

The need to balance economic growth with environmental protection

All of the above

Improved public health

Reduced environmental damage

Increased economic productivity

All of the above

Reduce their energy consumption

Use public transportation or walk instead of driving

Recycle and compost

Plant trees

All of the above

More stringent standards

More focus on regulating emissions from mobile sources

More emphasis on international cooperation

All of the above