Rooting for clean energy, with our eyes open.
Where solar, wind, nuclear and the grid stand today, and the gear worth buying for your own house.
Home battery backup systems
Buying guides
Gear that keeps the lights on when the grid can't.
Topics
Solar
The world installed a record 647 gigawatts of solar in 2025.
Wind
Wind made about 10% of US electricity in 2025, enough for roughly 43 million homes.
Nuclear
For the first time in the US, closed reactors are coming back online.
Grid & storage
NREL's modeling says a reliable US grid could run on 60% to 80% wind and solar by 2035.
Oil & gas
In the last 20 years, oil has sold for $147 a barrel and for less than nothing.
Climate & policy
How scientists know it's us, and what governments have tried since.
Home energy
The US loses about two-thirds of the energy it uses, mostly as heat.
New fuels & tech
Drivers worldwide bought more than 20 million electric cars in 2025. Hydrogen and carbon capture are much further behind.
Recently updated
The best home battery backup systems in 2026, and what they cost
A home battery backup costs $15,650 installed on average in 2026. Compare Tesla Powerwall 3, FranklinWH, Enphase, Generac and EcoFlow plug-in kits.
UpdatedThe best portable power stations in 2026
The best portable power station for most people is the EcoFlow DELTA 3 Plus. Compare 7 picks for home backup and camping, with specs and 2026 prices.
UpdatedHow 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.
UpdatedElectricity 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.
UpdatedThe 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.
UpdatedGeothermal 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.
UpdatedEnergy updates for believers
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