Encyclopedia of Earth
- In the style of Wikipedia, this free, searchable reference covers topics "about the Earth, its natural environments, and their interaction with society."
Global Map of Human Impacts to Marine Ecosystems
- "... a set of maps showing the distribution of cumulative human impacts over the entire ocean, published in 2008 and updated in 2015."
NASA - Earth
- NASA's unique ability to collect data and study our planet contributes to the education and services, including weather forecasting and resource management.
National Geographic Society
- Uncovering new insights about the natural and cultural worlds since 1888.
NOAA Photo Library
- "The collection includes thousands of weather and space images, hundreds of images of shores and coastal seas, and thousands of marine species images ranging from whales to the most minute plankton."
Plants Database
- "The PLANTS Database provides standardized information about the vascular plants, mosses, liverworts, hornworts, and lichens of the U.S. and its territories."
Science.gov
- "The portal offers free access to research and development (R&D) results and scientific and technical information from scientific organizations across 13 federal agencies."
U.S. EPA: Water
- US EPA research concerning water, wildlife, and other topics that effect the Clean Water Act and Safe Drinking Water Act.
U.S. Geological Survey (USGS)
- The Department of the Interior's vast earth and biological data holdings
USGS Forest and Rangeland Ecosystem Science Center
- One of the USGS Science centers focusing on the environments of the western United States.
Woods Hole Oceanographic Institution
- "The Woods Hole Oceanographic Institution is dedicated to advancing knowledge of the ocean and its connection with the Earth system through a sustained commitment to excellence in science, engineering, and education, and to the application of this knowledge to problems facing society."
World Wide Science.org
- "WorldWideScience.org is a global science gateway—accelerating scientific discovery and progress through a multilateral partnership to enable federated searching of national and international scientific databases and portals."