Science.gov searches over 55 databases and over 2100 selected websites from 13 federal agencies, offering 200 million pages of authoritative U.S. government science information including research and development results.

Information and resources from the EPA.

Official energy statistics from the U.S. Government.

The connection to science, technology, and engineering research information from the U.S. Department of Energy.

HERO contains the key studies EPA uses to develop environmental risk assessments for the public. EPA uses risk assessments to characterize the nature and magnitude of health risks to humans and the ecosystem from pollutants and chemicals in the environment.

This department of the federal government is responsible for promoting energy development and efficiency, as well as regulating the use and extraction of energy resources.

DOE Green Energy is a portal to information about various forms of green energy, including solar, wind, bioenergy, and others. This free search of green energy DOE technical report literature, green energy patent information, and much more is provided by the U.S. The database indexes results from thousands of DOE-sponsored research and development projects.

NSCEP distributes EPAs publications to the public. NSCEP contains EPA publications, with more than 7,000 hardcopy titles in stock and more than 35,000 digital titles. The searches look at a full text index of the electronic documents and an index of the metadata records for both the hardcopy and digital titles.