Research and data from Office of Scientific and Technical Information.

Science.gov searches over 60 databases and over 2200 selected websites from 15 federal agencies, offering 200 million pages of authoritative U.S. government science information including research and development results.

Resources to protect human health and the environment. See Environmental Topics.

One-stop source for environmental information via the Environmental Protection Agency.

Resource for searching databases on toxicology, hazardous chemicals, environmental health, and toxic releases.

The NCDC maintains the world's largest climate data archive and provides climatological services and data to every sector of the United States economy and to users worldwide. Records in the archive range from paleoclimatology data to centuries-old journals to data less than an hour old.

A science organization that provides impartial information on the health of our ecosystems and environment, the natural hazards that threaten us, the natural resources we rely on, the impacts of climate and land-use change, and the core science systems that help us provide timely, relevant, and useable information.

Provides access to over 130,000 publications written by USGS scientists over the century-plus history of the bureau

Collects and disseminate reliable, impartial, and timely information that is needed to understand the nation's water resources.

Exploring America