Chart of the week

Batteries

Chart: Surprise — batteries got cheaper again last year

The steady downward march of lithium-ion battery prices is one of the key stories of the energy transition. The trend continued last year.

By Dan McCarthy . 6 February 2026
Clean energy manufacturing

Chart: Trump cratered the clean-energy manufacturing boom

In 2025, companies spent less on U.S. factories for solar panels, EVs, and more. A bonus chart shows why this trend may continue in the year to come.

By Dan McCarthy . 23 January 2026
Solar

Chart: Solar is finally bigger than coal in Texas

Sure, coal had a comeback in 2025. But the year also marked the first time Texas got more power from solar than from the increasingly expensive fossil fuel.

By Dan McCarthy . 16 January 2026
Clean energy

Chart: How the US electricity mix changed last year

Solar and coal were up, and gas, surprisingly, was down. Here are the numbers behind a wild year for the U.S. power sector.

By Dan McCarthy . 9 January 2026
Clean energy

Clean energy is still winning. These 10 charts prove it.

Solar and wind are beating new power demand, steelmaking is slowly getting off coal, and more clean energy victories are clear in these charts.

By Kathryn Krawczyk . 26 December 2025
Clean energy

Chart: Clean energy remains dominant in the US — despite Trump

Trump spent much of 2025 boosting fossil fuels and blocking renewables, but 92% of new power additions through November were solar, wind, or batteries.

By Dan McCarthy . 19 December 2025
Geothermal

Chart: Geothermal energy is attracting more and more investment

There’s a wave of renewed interest in the energy source, which could help the world keep pace with rising electricity demand and decarbonization targets.

By Dan McCarthy . 12 December 2025
Solar

Chart: Hungary is leading the world in solar adoption

The small European country unseated a longtime champion in a ranking of nations by how much of their electricity comes from solar.

By Dan McCarthy . 5 December 2025
Clean energy

Chart: Solar and wind are meeting — and exceeding — new power demand

Through September, the two clean-energy sources outpaced growth in power demand. That trend needs to accelerate for the world to phase out fossil fuels.

By Dan McCarthy . 28 November 2025
Electric vehicles

Chart: EVs are ascendant — and gas cars are past their prime

Sales of gas-only vehicles are down by 31% from their peak, while electric vehicle sales are growing rapidly worldwide, largely due to China.

By Dan McCarthy . 21 November 2025