The Environmental Protection Agency (EPA) protects human and environmental health by regulating the manufacturing, processing, distribution, and use of chemicals and other pollutants. It oversees programs to promote energy efficiency, environmental stewardship, sustainable growth, air and water quality, and pollution prevention. Some of the areas that aren’t covered by the EPA include wildlife, wetlands, food safety, and nuclear waste.
The United States Geological Survey (USGS) studies the landscape of the United States, its natural resources, and natural hazards, spanning the disciplines of biology, geography, geology, and hydrology.
Khan Academy is an American non-profit educational organization created in 2008 by Sal Khan. Its goal is creating a set of online tools that help educate students.