Energy Explained
Your guide to understanding energy
What is energy?
Units and calculators
U.S. energy facts
Use of energy
Energy and the environment
Also in What is energy?
- What is energy?
- Forms of energy
- Sources of energy
- Laws of energy
Also in Units and calculators explained
- Units and calculators
- Energy conversion calculators
- British thermal units (Btu)
- Degree days
Also in U.S. energy facts explained
- U.S. energy facts
- State and U.S. territory data
Also in Energy and the environment explained
- Energy and the environment
- Greenhouse gases
- Greenhouse gases and the climate
- Where greenhouse gases come from
- Outlook for future emissions
- Recycling and energy
Nonrenewable sources
Oil and petroleum products
Gasoline
Diesel fuel
Heating oil
Also in Oil and petroleum products explained
- Oil and petroleum products
- Refining crude oil
- Where our oil comes from
- Imports and exports
- Offshore oil and natural gas
- Use of oil
- Prices and outlook
- Oil and the environment
Also in Heating oil explained
- Heating oil
- Where our heating oil comes from
- Use of heating oil
- Prices and outlook
- Factors affecting heating oil prices
Hydrocarbon Gas Liquids
Natural gas
Coal
Nuclear
Also in Hydrocarbon gas liquids explained
- Hydrocarbon gas liquids
- Where do hydrocarbon gas liquids come from?
- Transporting and storing
- Uses of hydrocarbon gas liquids
- Imports and exports
- Prices
Also in Natural gas explained
- Natural gas
- Delivery and storage
- Natural gas pipelines
- Liquefied natural gas
- Where our natural gas comes from
- Imports and exports
- How much gas is left
- Use of natural gas
- Prices
- Factors affecting natural gas prices
- Natural gas and the environment
- Customer choice programs
Renewable sources
Renewable energy
Hydropower
Biomass
Biofuels
Also in Renewable energy explained
- Renewable energy
- Types & usages
- Incentives
- Portfolio standards
Also in Hydropower explained
- Hydropower
- Where hydropower is generated
- Hydropower and the environment
- Tidal power
- Wave power
- Ocean thermal energy conversion
Also in Biomass explained
- Biomass
- Wood and wood waste
- Waste-to-energy (MSW)
- Landfill gas and biogas
- Biomass and the environment
Also in Biofuels explained
- Biofuels
- Ethanol
- Biodiesel, renewable diesel, and other biofuels
- Biofuels and the environment
Wind
Geothermal
Solar
Secondary sources
Electricity
Hydrogen
Also in Electricity explained
- Electricity
- The science of electricity
- Magnets and electricity
- Batteries, circuits, and transformers
- Measuring electricity
- How electricity is generated
- Energy storage for electricity generation
- Electricity in the United States
- Generation, capacity, and sales
- Delivery to consumers
- Use of electricity
- Prices and factors affecting prices
- Electricity and the environment
Also in Hydrogen explained
- Hydrogen
- Production of hydrogen
- Use of hydrogen