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Reposted by Mark Z. Jacobson

Khashoggi's Ghost @urocklive1.bsky.social · 30/09/2026

This seems so obvious .... except to the people who think their salaries and future career opportunities depend on them not seeing the obvious. Who will get to make billions on an ongoing basis if everyone switches to cheap renewable energy?

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Mark Z. Jacobson @mzjacobson.bsky.social · 13h

203 days and counting this year with WindWaterSolar meeting >100% of demand for part of the day. WWS>100% for 17.7% of all hours of year. 56% of all demand during year met by WWS Gas down 47% in '26 vs '23. No blackouts

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Reposted by Mark Z. Jacobson

Alex Pawlowski @apawlows.bsky.social · 29/09/2026

In today's CA EPIC opening presentation, CARB chair Lauren Sanchez repeating @mzjacobson.bsky.social reporting, clean energy is leading the way in CA, solar has outperformed gas this year in energy delivered

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Mark Z. Jacobson @mzjacobson.bsky.social · 30/09/2026

Rep. Dave Min: "We should be leading the future, not subsidizing the horse and buggy." "China is dominating the clean energy sector, creating a clear national security issue, even as Repubs keep doubling down on aging and expensive fossil fuel technologies." youtube.com/shorts/VHwVo...

youtube.com

Rep. Dave Min: "We should be leading the future, not subsidizing the horse and buggy."

YouTube video by Rep. Dave Min

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 28/09/2026

Argument For Clean Energy Has Flipped IEA's new "Electrification" lists its benefits as energy security, competitiveness, then emissions Its thesis can be traced to 2009, when M Jacobson wrote in Sci American we could power 100% of the planet w/renewables www.onlygoodnewsdaily.com/post/the-arg...

onlygoodnewsdaily.com

The Argument For Clean Energy Has Flipped | OGN Daily

It all started as a moral argument for taking climate action, but that driver has now been relegated to third place.

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Mark Z. Jacobson @mzjacobson.bsky.social · 30/09/2026

Here is also a 2009 precursor to the 2009 Scientific American paper on the energy security benefits of clean, renewable energy Review of solutions to global warming, air pollution, and energy security web.stanford.edu/group/efmh/j...

web.stanford.edu

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Mark Z. Jacobson @mzjacobson.bsky.social · 28/09/2026

onlygoodnewsdaily.com

The Argument For Clean Energy Has Flipped | OGN Daily

It all started as a moral argument for taking climate action, but that driver has now been relegated to third place.

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Mark Z. Jacobson @mzjacobson.bsky.social · 26/09/2026

199th of 268 days (74.3%) of the year with WindWaterSolar meeting>100% of demand for part of the day Compares with 186 days in '25 thru 268 days 119 in '24 51 in '23 56.1% of all electricity in CA produced with WWS in '26 Solar up 52%, wind up 23%, batteries up 309%, gas down 47% in '26 v '23

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Mark Z. Jacobson @mzjacobson.bsky.social · 21/09/2026

Approaching 200 days with WindWaterSolar supplying >100% of demand for part of the day 195 of 263 (74.1%) and 9 straight 100% WWS days 18% of all hours in 2026 have been >100% WWS has met 56.2% of all demand in 2026 Gas is down 48% in 2026 vs 2023, replaced by solar, wind, batteries, and imports

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Mark Z. Jacobson @mzjacobson.bsky.social · 19/09/2026

Solar alone met a peak of 102% of demand; WWS met 128% of demand Fri 9/18 on CAISO grid! CAISO now 24.27 GW solar, 12.33 GW wind, 17.23 GW batteries, vs avg demand last 12 mo of 24.3 GW Gas down 48%, wind up 23%, solar up 52%, batteries up 314% '26 v '23 WWS has met 56.3% of demand '26; Gas 20.1%

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 17/09/2026

Energy Expert: Renewables Will Save $Trillions & Millions of Lives Avoid 7 mil air pol deaths/y Slow then reverses global warming Reduce energy needs 55% & energy costs 66% Create 23 mil more jobs than lost Need less land than current energy Keep grids stable sonomasun.com/2026/09/17/e...

sonomasun.com

Energy Expert: Renewables Will Save Trillions, Millions of Lives - Sonoma Valley Sun

Stanford Professor Provides a Roadmap By Larry Barnett The world’s use of fossil fuels has been marked by successive crises and temporary solutions. The widespread use of coal for heating and power ge...

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Mark Z. Jacobson @mzjacobson.bsky.social · 17/09/2026

sonomasun.com

Energy Expert: Renewables Will Save Trillions, Millions of Lives - Sonoma Valley Sun

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Mark Z. Jacobson @mzjacobson.bsky.social · 17/09/2026

Here is an example of how AI cannot be used to determine cause and effect. Suppose you want to know the impact of CO2 on climate. With a physics model, you run two simulations, one with the current atmosphere and a second with the current atmosphere but without CO2.

web.stanford.edu

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Mark Z. Jacobson @mzjacobson.bsky.social · 15/09/2026

AI has its limits. It is not so good as physical models for predicting weather extremes www.science.org/doi/10.1126/... has little ability to predict normal weather past 15-30 days or determine cause & effect like a physical model, so no ability to predict impacts of chemicals on future climate.

science.org

Physics-based models outperform AI weather forecasts of record-breaking extremes

Physics-based models still outperform artificial intelligence-based weather models in forecasting record-breaking extreme events.

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Mark Z. Jacobson @mzjacobson.bsky.social · 15/09/2026

I'm posting this because there are still people pretending publicly the Clack paper was just a normal science article when the only legal ruling on this issue with evidence, witnesses, and testimony was the paper had false facts & abnormal criticism that went far beyond debate x.com/mzjacobson/s...

x.com

Mark Z. Jacobson (@mzjacobson) on X

You should do your research before making bogus claims. I won the only legal case that included evidence, a trial, and witnesses, and this ruling can never be appealed. The trial in that case justifie...

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Mark Z. Jacobson @mzjacobson.bsky.social · 15/09/2026

Hello. What happened to all the trolls claiming that renewables increase electricity prices and destabilize grids?

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Mark Z. Jacobson @mzjacobson.bsky.social · 15/09/2026

The more WindWaterSolar, the more reliable a grid in terms of matching supply with demand. Data show more WWS as a fraction of grid electricity demand reduces not only retail electricity prices with statistical significance but also max annual wholesale prices with statistical significance.

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Mark Z. Jacobson @mzjacobson.bsky.social · 15/09/2026

After the worst heat of the year, fossil gas use is still 48% lower in 2026 than in 2023 and has supplied only 20% of all electricity in 2026 versus 39% in 2023. 189th >100% WWS day of 2026. 56.3% of all electricity during the year has been from WWS.

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Mark Z. Jacobson @mzjacobson.bsky.social · 13/09/2026

WWS supply has now exceeded 100% of demand on the California ISO grid for 18.5% of all hours in 2026. 56.2% of all demand in 2026 has been met by WWS. 187th 100% WWS day of the year on Sat, Sep. 13. WindWaterSolar continues to provide stable output in California, even through heat waves.

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 06/09/2026

Still No Miracles Needed is correct. Existing technologies can solve our climate, pollution, and energy security problems.

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 05/09/2026

WindWaterSolar continues to meet >100% of demand for part of 6th straight day (and 185th of 247 in 2026) in CA Solar up 53%, wind up 21%, batteries up 319%, gas down 49% 2026 v 2023 Gas meeting only 19.57% of demand, vs 38.75% in '23 57% of all demand met with WWS 2026 Avg 4.4 h/day with>100% WWS

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 04/09/2026

This is how fast oil use can disappear China's reduction in oil consumption during first half of 2026 due to replacement of fossil vehicles with EVs exceeded the UK’s entire oil consumption during that period China’s CO2 emis fall Q226 due to plummeting oil use carbonbrief.org/analysis-chi...

carbonbrief.org

Analysis: China’s CO2 emissions fall in Q2 2026 due to plummeting oil use - Carbon Brief

China’s carbon dioxide (CO2) emissions fell by 1% in the second quarter of 2026, as oil consumption plummeted amid the strait of Hormuz crisis.

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Mark Z. Jacobson @mzjacobson.bsky.social · 06/09/2026

Still No Miracles Needed is correct. Existing technologies can solve our climate, pollution, and energy security problems.

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Mark Z. Jacobson @mzjacobson.bsky.social · 05/09/2026

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 03/09/2026

The strong correlation between WindWaterSolar and lower US electricity prices is not due to random chance Multiple statistically-significant regression lines indicate that, above 10% WWS supply relative to grid+behind-the-meter demand, the correlation between more WWS and lower prices is not random

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 04/09/2026

EV's use 1/4th the energy in electricity as ICEs use in gasoline or diesel, so even if electricity is from coal, energy use & CO2 emis decrease 75% with every EV. Plus, the intake fraction of vehicle exhaust is 25x that of power-plant exhaust, so human pollution mortality goes down 99% with an EV

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Mark Z. Jacobson @mzjacobson.bsky.social · 04/09/2026

carbonbrief.org

Analysis: China’s CO2 emissions fall in Q2 2026 due to plummeting oil use - Carbon Brief

China’s carbon dioxide (CO2) emissions fell by 1% in the second quarter of 2026, as oil consumption plummeted amid the strait of Hormuz crisis.

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Mark Z. Jacobson @mzjacobson.bsky.social · 03/09/2026

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Mark Z. Jacobson @mzjacobson.bsky.social · 03/09/2026

Gas relegated to mid-July to August, and that use will disappear as WWS continues growing 4 days straight & 183/245 (75%) with WWS meeting >100% of demand for 4.4 h/day Gas down 49.1% '26 v '23 WWS up 21% Solar up 53% Wind up 21% Batteries up 319% WWS has met 56.7% of demand in '26 v 47.2% in '23

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Mark Z. Jacobson @mzjacobson.bsky.social · 03/09/2026

Fervo-Google ink enhanced geothermal datacenter deal www.utilitydive.com/news/analyst... just like science suggests "EGS plus solar, wind, batteries, and/or green H2 production and fuel cells can potentially provide constant year-round electricity for datacenters" web.stanford.edu/group/efmh/j...

utilitydive.com

Fervo-Google geothermal deal underscores baseload power scarcity, analysts say

Key risks remain, however, including “first-of-a-kind execution,” interconnection bottlenecks, capital intensity and competing technology paths, according to a research note from financial services co...

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Mark Z. Jacobson @mzjacobson.bsky.social · 01/09/2026

8 months into 2026 and WindWaterSolar consistently supplies demand every day in CA 180 of 241 days (75%) with WWS meeting >100% of demand for an avg of 4.4 h/day among all days, and meeting 56.8% of demand during the year. Gas down 50%, batteries up 318%, solar up 52% & wind up 20% in 2026 v 2023.

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Mark Z. Jacobson @mzjacobson.bsky.social · 31/08/2026

Offshore wind set to be the ‘next frontier’ in renewable power in Europe "increasingly treated as ‘strategic infrastructure’...one of the ‘few scalable, utility‑grade renewables capable of delivering very large annual increments of low‑carbon electricity‘." dredgewire.com/offshore-win...

dredgewire.com

Offshore wind set to be the ‘next frontier’ in renewable power in Europe - DredgeWire

Offshore wind in Europe is moving into a ‘supremacy phase’, as governments shift from action to execution, a new report from GlobalData has said. According to GlobalData’s report, Europe Renewable Ene...

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 28/08/2026

The easiest way (aside from efficiency and using less energy) to reduce increases in grid electricity demand is to install behind-the-meter (BTM) rooftop PV. web.stanford.edu/group/efmh/j...

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 27/08/2026

Promising new @EIAgov data for 1st half of 2026: WindWaterSolar is surging in the U.S. and keeping electricity prices lower in states with lots than in states with little WWS 27.1% of all grid+BTM U.S. electricity demand from Aug 1, 2025-Jun 30, 2026 was met with WWS (versus 24.7% the prior year)

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 28/08/2026

Wind, solar, geothermal, and hydro (WindWaterSolar) now meet 27.1% of all U.S. grid+behind-the-meter electricity demand (from Q325-Q226). Two states meet more than 100% of demand. Here is the WWS mix meeting demand in every state. Table: web.stanford.edu/group/efmh/j...

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 30/08/2026

Yes, but heat isn't an excuse. A home with PV, good insulation, and heat pumps produces excess electricity on the hottest day of the year, sending the excess back to the grid, so uses zero net grid electricity. x.com/mzjacobson/s... The prob is TX needs more PV and better building standards

x.com

Mark Z. Jacobson (@mzjacobson) on X

Peak temperature 104 F outside today. Inside, 77F and sent 27 kWh back to the ground to help avoid blackouts. How? Heat pumps, Roof PV, batteries, insulation #WWS #WindWatetSolar

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 28/08/2026

California pays the 13th-lowest grid electricity bills per capita in the US despite having the 2nd-highest electricity price. Texas pays the 38th-lowest bills per capital (21% higher than CA) despite half the electricity price as CA. Why, because TX consumes 2.5x the electricity per person as CA.

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Reposted by Mark Z. Jacobson

Kevin J. Kircher @kevinjkircher.com · 28/08/2026

Not sure why this gets lost in basically every conversation about energy affordability, but the bills we pay depend on both prices and usage. Energy efficiency, from appliance standards to building codes, is the most effective energy affordability policy in US history and there's not a close 2nd.

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Mark Z. Jacobson @mzjacobson.bsky.social · 28/08/2026

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Mark Z. Jacobson @mzjacobson.bsky.social · 28/08/2026

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Mark Z. Jacobson @mzjacobson.bsky.social · 28/08/2026

The easiest way (aside from efficiency and using less energy) to reduce increases in grid electricity demand is to install behind-the-meter (BTM) rooftop PV. web.stanford.edu/group/efmh/j...

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Mark Z. Jacobson @mzjacobson.bsky.social · 28/08/2026

The U.S. can meet 100% of grid+behind-the-meter (BTM) electricity demand with WindWaterSolar alone by 2057 if it continues to grow WWS at its current rate (2.35%/y) & demand stays constant. The U.S. currently (Q325-Q226) provides 27.1% of grid+BTM demand with WWS web.stanford.edu/group/efmh/j...

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