Home battery backup systems
Which whole-home battery we'd buy, and what it costs.
Read moreYour Guide to the Clean Energy Revolution
Explaining solar, wind, and clean energy breakthroughs, and how they impact your life.
Buying Guides
No BS energy products that help keep the lights on
Topics
Solar
Rooftop panels and utility-scale solar farms.
8 articlesWind
Why wind turbines keep getting bigger, on land and at sea.
5 articlesNuclear
How safe reactors are, and what the new designs promise.
4 articlesGrid & storage
How power gets from the plant to your plug.
11 articlesOil & gas
Oil and gas, from the wellhead to the pump.
7 articlesClimate & policy
The science of warming and the treaties that followed.
8 articlesHome energy
Backup power and a warmer, cheaper house.
5 articlesNew fuels & tech
Electric cars, hydrogen, biofuels and carbon capture.
6 articlesRecently updated
All articles
Updated
How carbon pricing works around the world in 2026
See how carbon pricing works, from carbon taxes to cap-and-trade markets, plus current US and EU allowance prices and why the US has no federal one.
Updated
Electricity prices around the world, by country
Household electricity price per kWh by country in US dollars, where the US ranks, and why German and British homes pay more than twice as much.
Updated
The future of nuclear energy in the US and worldwide
The future of nuclear energy includes US plant restarts backed by tech money and a Chinese reactor-building boom that's now roughly half the world's total.
Updated
Geothermal Heat Pumps for Homes: How They Work and What They Cost
A geothermal heat pump doesn't tap into volcanic heat. It works because the ground a few feet down holds a steady temperature year-round, and installed systems for a typical home run $15,000 to $40,000.
Updated
How geothermal energy works, and why EGS is finally taking off
A geothermal power plant makes electricity by pulling heat out of the ground and using it to spin a turbine, the same basic principle behind a coal or gas plant, minus the fuel and the smokestack.
Updated
Ethanol, biodiesel and renewable diesel: how biofuels differ
Ethanol, biodiesel and renewable diesel are three different products made three different ways. Ethanol comes from fermenting starch or sugar. Biodiesel comes from a chemical swap called transesterification, and renewable diesel comes from a refinery process called hydrotreating that produces a fuel nearly identical to petroleum diesel.
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