Energy sources are materials, processes, or systems that produce usable power to fuel human activities. Each source has unique characteristics regarding availability, efficiency, and economic viability.
-
There’s heat beneath your feet—a vast, largely untapped renewable energy resource. Geothermal energy has a unique role to play in providing clean energy across the entire United States.May 5, 2026 -
Providing clean, reliable energy to meet the nation’s energy, environmental, and economic needs.April 30, 2026 -
The Energy Department works to ensure domestic and global oil supplies are environmentally sustainable and maintains emergency petroleum stockpiles.March 31, 2026