National Park Service (NPS): The NPS is an agency within the U.S. Department of the Interior that manages national parks across the country with an emphasis on preserving their natural beauty.
Clean Air Act: This federal law regulates air pollution emissions from industries and vehicles in order to maintain air quality standards.
Endangered Species Act: The Endangered Species Act is designed to protect species at risk of extinction by identifying them as endangered or threatened and implementing measures for their conservation.