Which of the following is primarily protected by the Clean Air Act enacted in 1970?

• A. Water quality
• B. Wildlife habitats
• C. Clean air
• D. Forest lands

Answer: (C)

The main concept tested is what the Clean Air Act is designed to protect. This 1970 law focuses on reducing air pollution and improving nationwide air quality. It gives the EPA authority to set air quality standards for pollutants and to regulate emissions from major sources like factories and vehicles. States must develop plans to meet those standards, all aimed at protecting public health and welfare through cleaner air.

Water quality is primarily addressed by the Clean Water Act, not the Clean Air Act, so that option isn’t the focus here. Wildlife habitats and forest lands are protected by other laws and management programs, not the central aim of the Clean Air Act. Because the act targets air quality directly, the correct choice is clean air.