EIA Centre, University of Manchester (UK)
- Educational programs, analyses, and links related to environmental impact assessment.
- http://www.art.man.ac.uk/EIA/eiac.htm

CHAINET - European network on chain analysis for environmental decision support
- Project to create a guidebook on different environmental analytical tools.
- http://www.leidenuniv.nl/interfac/cml/ssp/projects/chainet/

US EPA Office of Federal Activities - NEPA
- About the agency's filing and review of US environmental impact statements (EISs), EPA compliance with NEPA, and technical assistance and capacity building for environmental compliance, enforcement, and impact assessment in other countries.
- http://www.epa.gov/compliance/nepa/index.html

US EPA Life-Cycle Assessment
- Site established to promote the use of LCA to aid in understanding the human health and environmental impacts of products, processes, and activities. Includes primer on LCA and links to related materials.
- http://www.epa.gov/ORD/NRMRL/lcaccess/

Canadian Environmental Assessment Agency
- Comprehensive EIA resource for Canada, including EIA legislation, guidance, training opportunities, specific EIA reports and reviews, and EIA links.
- http://www.acee-ceaa.gc.ca/

Centre of Environmental Science (CML) - Section Substances and Products
- Leiden university group, specializing in life cycle assessment and substance flow analysis. Provides information on the group, its ongoing projects and several downloadable papers and reports.
- http://www.leidenuniv.nl/interfac/cml/ssp/

Environmental Impact Assessment of Irrigation and Drainage Projects
- Guide for consultants and planners in developing countries, from FAO.
- http://www.fao.org/docrep/V8350E/V8350E00.htm

The California Environmental Quality Act
- Statute, guidelines, case law, FAQs, online archive of environmental assessment reports, and other resources related to the state impact assessment law.
- http://ceres.ca.gov/topic/env_law/ceqa/

Convention on Environmental Impact Assessment in a Transboundary Context
- International EIA convention signed in 1991. Text, ratification status, implementation reports, and related resources.
- http://www.unece.org/env/eia/

Analytical Strategic Environmental Assessment (ANSEA) Project
- Reports on the progress of a team effort to define a logically founded methodology for strategic environmental assessment of policies, plans and programs. Participants represent 7 European countries.
- http://www.taugroup.com/ansea/

U.S. Department of Energy NEPA Web
- Site contains DOE NEPA regulations and guidance, text of many DOE EISs and EAs, and links to other resources on NEPA and environmental impact assessment.
- http://www.eh.doe.gov/nepa/

CEQ NEPA Net
- Council on Environmental Quality's central information hub for the U.S. National Environmental Policy Act and the federal environmental impact assessment process, including environmental impact statements.
- http://ceq.eh.doe.gov/nepa/nepanet.htm