Topic summary
Energy companies

Extracted from the Wikipedia article Energy industry.
- the fossil fuel industries, which include petroleum industries (oil companies, petroleum refiners, fuel transport and end-user sales at gas stations), coal industries (extraction and processing), and the natural gas industries (natural gas extraction, and coal gas manufacture, as well as distribution and sales);
- the electrical power industry, including electricity generation, electric power distribution, and sales;
- the nuclear power industry;
- the renewable energy industry, comprising alternative energy and sustainable energy companies, including those involved in hydroelectric power, wind power, and solar power generation, and the manufacture, distribution and sale of alternative fuels; and,
- traditional energy industry based on the collection and distribution of firewood, the use of which, for cooking and heating, is particularly common in poorer countries.