Governments sponsor research, collect statistics, grant patents, enact laws, participate in treaties, and more. Their publications and websites offer valuable information for researchers.
Using Google: Since many government sites are freely available, Google searching can be a useful way to find government sources. Search Google and filter your results by .gov. The limiter ".mil" --- for military --- may also be useful.

Some Specific Sites and Databases:
- International Energy Agency (IEA) - news, reports, statistics, and more.
- U.S. Energy Information Administration - also includes international coverage
- World Health Organization (WHO)
- World Bank
- CIA World Fact Book - The World Fact book provides information on the history, people, government, economy, geography, communications, transportation, military, and transnational issues for 267 world entities.
For more sites and sources: