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What fracking is and how much US oil and gas comes from it
Fracking is short for hydraulic fracturing, a technique that injects water, sand and small volumes of chemical additives into low-permeability rock to…
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What is renewable energy, and how much power does it make?
Renewable energy is energy from sources that nature replenishes faster than people use them, and it made 33.8% of the world's electricity…
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What is a heat pump? An electric machine that moves heat
A heat pump is an electric machine that moves heat into your home from outdoors, and ENERGY STAR says it can deliver…
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What fossil fuels are and how much of the world still runs on them
Fossil fuels supplied 86% of the world's energy in 2025, according to the Energy Institute's Statistical Review. The US got 82% of…
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How wind turbines got so much bigger
The average new wind turbine installed in the US in 2025 has a 141-meter rotor and a rating of 3.76 megawatts. Dongfang…
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The sources of home heat loss
Air leaks, a thin attic, old windows, leaky ducts, and uninsulated floors are where a house loses heat, and together they waste…
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What is Article 6 of the Paris Agreement?
Article 6 of the Paris Agreement lets countries meet their climate targets by trading verified emissions cuts with each other, or by…
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Why the US power grid is under strain
NERC, the nonprofit that oversees North American grid reliability, now expects summer peak demand to climb by more than 224 gigawatts over…
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Why banks finance fossil fuels
Banks finance fossil fuel companies because oil, gas and coal producers borrow and sell bonds like any other big company, and in…
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How much maintenance do solar panels need
Most home solar systems keep at least 80% of their original power output after 25 years, the US Department of Energy says,…
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