Mark Z. Jacobson
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mzjacobson.bsky.social
Mark Z. Jacobson
@mzjacobson.bsky.social

Climate, pollution, clean/renewable energy
Stanford U Prof, Civil & Env Eng; Director, Atmos/Energy Program
Cofounder-Solutions Project; Appeared on Letterman
Testified Held v Montana

https://web.stanford.edu/group/efmh/jacobson/
Stanford.io/Jacobson .. more

Mark Zachary Jacobson is a professor of civil and environmental engineering at Stanford University and director of its Atmosphere/Energy Program. He is also a co-founder of the non-profit, Solutions Project. .. more

Environmental science 27%
Public Health 16%

CA solar is almost as reliable as coal:

2025 avg capacity factor of all 21.58 GW* of solar on the @California_ISO grid:

30.2%

2024 CF US coal:

42.6%

www.eia.gov/electricity/...

->Coal not much more reliable than CA solar

*=avg Dec '24 & Dec '25 nameplates
Solar output: 57,054 GWh/y
Electric Power Monthly - U.S. Energy Information Administration (EIA)
www.eia.gov

Reposted by Mark Z. Jacobson

Reposted by Mark Z. Jacobson

Reposted by Mark Z. Jacobson

SuperBowlLX was the first Super Bowl with the stadium powered by 100% solar alone for pre-game show (10AM-3PM PT), since California ISO grid was powered by 100% solar during that time

22nd day of 2025 w/100% WWS on grid-no blackouts

SB LVIII in Las Vegas was 100% RE but not solar alone

Reposted by Mark Z. Jacobson

Reposted by Mark Z. Jacobson

No, they are not part of CAISO, which represents 82% of CA and parts of Nevada.

But LAShould have good numbers

Reposted by Mark Z. Jacobson

Reposted by Mark Z. Jacobson

Reposted by Peter Thorne

It's the dead of winter, and California just supplied a peak of 117% of its demand with solar alone and 136% of its demand from WindWaterSolar and over 100% of demand for 6 hours.

Gas output down 58% and batteries output up 303% in 2025 v '2023

Solar+batteries replacing gas

Reposted by Mark Z. Jacobson

Reposted by Mark Z. Jacobson

In 2025, solar and wind surpassed coal as a global energy source.

Clean energy is surging — with or without Trump
yaleclimateconnections.org/2026/01/desp...
Despite Trump, renewable energy keeps surging » Yale Climate Connections
In 2025, solar and wind surpassed coal as a global energy source.
yaleclimateconnections.org

Reposted by Mark Z. Jacobson

Reposted by Mark Z. Jacobson

Reposted by Mark Z. Jacobson

Reposted by Mark Z. Jacobson

Reposted by Mark Z. Jacobson

Reposted by Mark Z. Jacobson

Reposted by Mark Z. Jacobson