Energy Efficiency

Storing electricity in huge quantities, in a giant battery or by some other method, is cost prohibitive today. Yet solving this challenge would forever change our energy world, by turning intermittent sources, like wind and solar, into on-demand...
Hydropower can be an always-on, baseload power, or spin up almost instantly to follow rising electricity demand—with no fuel to burn and no emissions. Building the power plants is high impact and expensive, but they produce cheap electricity for many...
There are three types of geothermal energy. In a few places, high temperatures from within the earth are naturally concentrated near the surface—a fantastic resource. Elsewhere, we’re experimenting with drilling deeper wells, fracturing the rock, and...
Nuclear is thousands of times more powerful than every other energy. And it’s our only baseload electricity generation that produces no CO2. With populations growing and concentrating in ever-larger cities, this super-concentrated energy has many...
Oil goes into myriad products that have transformed our modern world, but none so much as gasoline and diesel. They provide a level of mobility for people and products never before known, creating the first global economy, which is now so dependent on...
Solar is the lowest impact energy technology, and the ‘fuel’ is free. So why don’t we have solar panels on every rooftop? Price. Solar panels and concentrating solar plants are the most expensive form of power production. With the help of subsidies...
The U.S. electric grid has been called the largest machine in the world. It’s also one of the oldest in continuous operation. Upgrading transmission in developed countries, and building more of it elsewhere, will be expensive but necessary to reduce...
To get a substantial portion of our electricity from wind means building hundreds of thousands of turbines. They’re affordable, so we could do that. But we usually don’t live in the windiest areas, so we’ll also need to build transmission lines—which...
Although oil, natural gas, and coal will remain the primary energy sources for the foreseeable future, a variety of resources will be needed to meet the world’s growing demand. All energy sources have benefits and challenges, whether it’s in...
Learn more about the Obama Administration's efforts to reduce dependence on oil, promote energy efficiency, and invest in a clean energy future.

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