Every time energy changes forms, some portion is "lost." With each change some amount of the original energy turns into heat.
LED lighting offers greater energy efficiency, longer lamp life, and exceptional control over the color and hue of emitted light compared to older lighting technology. Learn more.
An increasing share of future needs will be met by technologies now in the research or development stage.
Many of the world’s poorest people, who lack the resources to respond to the impacts of climate change, are likely to suffer the most.
Explore the usages of primary energy sources throughout the United States.
Today's best-performing all-electric vehicles can travel up to 300 miles emissions-free on a single battery charge.
The future of American society and its unprecedented standard of living depend, to a large degree, on how we use energy. The energy choices we make shape not only our quality of life, but the health of the environment, how we work and play, the strength of our economy, and our national security. Sound decisions by individuals, communities, and the nation depend on trustworthy and objective energy information. To help fill that need, the National Academies of Sciences, Engineering, and Medicine provide this energy primer.
Discover how the strength of American industry, speed of transportation, and countless modern conveniences all come from our ingenious use of energy.
The United States depends on a variety of energy sources. What advantages and challenges does each one present to our nation and its people?
Learn about the costs of our high standard of living—to the environment, to our national security, and to irreplaceable resources.
A unit of luminous flux represents the amount of light emitted that is visible to the human eye. In the International System of Units, it is the amount of light a one candela source emits over a square radian angle. It is used in measuring and comparing the amount of light visible to the human eye produced by lamps such as light-emitting diodes, compact fluorescent lights, and incandescent bulbs.
- America’s Energy Future: Technology and Transformation (2009)
- Real Prospects for Energy Efficiency in the United States (2010)
- Electricity from Renewable Resources: Status, Prospects, and Impediments (2010)
- Liquid Transportation Fuels from Coal and Biomass: Technological Status, Costs, and Environmental Impacts (2009)