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Guides

Your Guide to the Clean Energy Revolution

Explaining solar, wind, and clean energy breakthroughs, and how they impact your life.

Rooftop solar panels on a brick house

Buying Guides

No BS energy products that help keep the lights on

Topics

Solar

Rooftop panels and utility-scale solar farms.

8 articles

Wind

Why wind turbines keep getting bigger, on land and at sea.

5 articles

Nuclear

How safe reactors are, and what the new designs promise.

4 articles

Grid & storage

How power gets from the plant to your plug.

12 articles

Oil & gas

Oil and gas, from the wellhead to the pump.

9 articles

Climate & policy

The science of warming and the treaties that followed.

8 articles

Home energy

Backup power and a warmer, cheaper house.

6 articles

New fuels & tech

Electric cars, hydrogen, biofuels and carbon capture.

6 articles

Recently updated

All articles
A Marcellus Shale natural gas drilling rig above a rural road in Pennsylvania

Updated

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…
Small ground-mounted solar arrays on a farm property

Updated

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…
Frost and snow on the outdoor unit of an air-source heat pump beside a brick wall

Updated

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…
An oil refinery at Anacortes, Washington

Updated

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…

Updated

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…
Color thermal infrared image of a house showing heat escaping through its roof and walls

Updated

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…