Trade Associations. There are many associations that represent parts of the fossil energy world. The broadest representation is by these groups:

Coal -- National Mining Association.
Oil -- American Petroleum Institute.
Gas -- American Gas Association.
Energy use: Association of Energy Services Professionals
Energie-Cités - association focusing on energy efficiency in the European municipalities, urban energy planning, urban transport, and European programmes.
International Association of Energy Economics - provides a forum for the exchange of ideas, experience and issues among professionals interested in energy economics.
National Association of State Energy Officials (NASEO) - represents state officials who hold primary responsibility over energy policy within their respective governments.

Yahoo Sites:

-Arts: Humanities: History: U.S. History: Organizations
-Business and Economy: Companies: Construction: Industry Information: Organizations
-Science: Energy: Organizations
-Science: Engineering: Organizations
-Social Science: Economics: Organizations

Regulation: burning of fossil fuels is regulated by both the states and the federal government.

The National Association of State Energy Officials is a good starting point for the states.
All new federal regulations are first proposed for public comment, then published in final form, in the Federal Register. Here is link to today's Federal Register. After regulations become final, the are collected in the Code of Federal Regulations.

Department of Energy (home page) including especially:
Energy Information Administration (home page), EIA is the independent
statistical and analytical agency within the U.S. Department of Energy.
--Energy Education Resources: Kindergarten Through 12th Grade is published by the National Energy Information Center (NEIC), a service of EIA, to provide a list of generally available free or low cost energy related educational materials.
--Energy Overview explains fossil and nonfossil energy use and production.
--Historical Data and Analysis provides historical production and consumption statistics.
National Association of State Energy Officials (NASEO) - represents state officials who hold primary responsibility over energy policy within their respective governments.
International Energy Agency is related to the United Nations.
--Demand Side Management Programme - International Energy Agency program. Includes information about energy efficiency, electricity, and more.

Trade periodicals and publications:

Energy.com has news and other publications.
Energy insight has daily news. Free trial subscription.
Pennwell has many books, directories and maps.

Other sources:

Alliance to Save Energy - non-profit coalition of business, government, environmental, and consumer leaders promoting efficient use of energy.
American Council for an Energy-Efficient Economy - non-profit devoted to research, publications and conferences on energy efficiency in buildings, utilities, applicances, office equipment, industry and transportation.
American Green Network - provides the latest information on renewable energy and energy efficiency technologies, and helps citizens actively promote clean energy alternatives to public policy leaders.
Association for the Consevation of Energy - aims to encourage a positive national awareness of the need for and benefits of energy conservation.
Beijing Energy Efficiency Center - promoting energy efficiency in China.
Center for Energy Efficiency and Renewable Technology (CEERT) - a collaboration of major environmental organizations, public interest groups and clean technology companies working to achieve a more sustainable energy future.
Center for Renewable Energy and Sustainable Technology (CREST) produces educational multimedia CD-ROMs and operates Solstice, an Internet service for the sustainable energy field.
Energy Extension Service - free residential, small business and transportation energy efficiency information, provided by the University of Texas at Arlington.
Energy Outreach Center
Energy Saving Trust - set up by the Energy Saving Trust to promote energy efficiency. Features the latest technical innovations that save consumers energy and money around their homes.
Energy Technology Data Exchange - an international consortium, owns the Energy Database, with over 3 million bibliographic citations of international energy research and development information.
Hydrate.org has information on undersea methane deposits that have enormous fuel potential.
International Institute for Energy Conservation (IIEC) - non-profit organization, with offices on four continents, seeking to accelerate the global adoption of energy-efficiency in order to enable economically and ecologically sustainable development.
Northwest Energy Efficiency Alliance - a non-profit consortium dedicated to transforming markets for energy-efficient products and services.
Pacific Institute is an independent, non-profit center created in 1987 to do research and policy analysis in the areas of environment, sustainable development, and international security.
Public Citizen - Critical Mass Energy Project - energy policy information relating to nuclear power, radioactive waste, renewable energy, energy efficiency, transportation and electricity restructuring.
Technology Transition Corporation - provides management and membership services to energy related commercialization and development organizations.
What are the Fossil Fuels -- tutorial by RH Logan, North Lake College, USA.
World Energy Assessment is a United Nations Development Program activity looking at the energy future prospects of developing countries.
World Energy Efficiency Association (WEEA) - a non-profit organization serving as a clearinghouse for information on energy efficiency programs, technologies and measures.