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Mark Z. Jacobson

@mzjacobson.bsky.social

4K followers 320 following 670 posts

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

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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%

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

In A Contest Between Solar & Ethanol, There Is One Clear Winner

cleantechnica.com/2025/10/09/i... @cleantechnica.bsky.social

In A Contest Between Solar & Ethanol, There Is One Clear Winner - CleanTechnica

The attacks on solar are inspired by ignorance and greed, not reality. Solar plus storage is the future; coal is the past.

cleantechnica.com

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Mark Z. Jacobson @mzjacobson.bsky.social · 14h

California marching forward preparing for offshore wind, ignoring the incompetence of those slowing it down.

California to spend $42m on offshore wind ports
renews.biz/103569/calif...

renews.biz

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Reposted by Mark Z. Jacobson

Ben Vost ❤🇺🇦🇵🇸 @beevee23.bsky.social · 22h

How much of US surface area is taken up with fossil fuel energy projects versus how much would be taken up by renewables if the US switched completely (not taking about health benefits or the reduction in the cost of energy) youtu.be/ccu-Qdp39xA?... by @mzjacobson.bsky.social

Busting a myth on how much land is needed for the U.S. to run on 100% renewables vs fossil+biofuels

YouTube video by Mark Z. Jacobson

youtu.be

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Mark Z. Jacobson @mzjacobson.bsky.social · 1d

Impressive. 5 more days straight with 100% WindWaterSolar on California ISO grid, making it 193 of 280 days in 2025

Gas down 18% v '24 & 37% v '23, replaced largely by solar & batteries

54.7% of all demand met by WWS

Demand down 1.7% v '24 & 1.1% v '23 due largely to growth of roof PV

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Mark Z. Jacobson @mzjacobson.bsky.social · 2d

World Nearing 'Crucial Turning Point' as Clean Energy Outpaces Demand - @newsweek.com

1st half of 2025 brought a small tipping point in the global energy system: @ember-energy.org

Clean sources grew more than demand and therefore they displaced some fossil fuels

www.newsweek.com/world-nearin...

World nearing 'crucial turning point' as clean energy outpaces power demand

Energy research group Ember said the global surge in clean energy more than met demand for electricity and led to the first fall in fossil fuel use this year.

www.newsweek.com

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Mark Z. Jacobson @mzjacobson.bsky.social · 2d

UK prime minister K. Starmer’s new partnership with US president Trump ushers in 'a golden age of nuclear'

But, 'Each year, nuclear adds as much net global power capacity as renewables add every two days'

www.newcivilengineer.com/opinion/a-go... @drpauldorfman.bsky.social @stephenjwt.bsky.social

A ‘Golden Age’ of nuclear? | New Civil Engineer

The reason is simple. Nuclear costs are huge and rising and significant delays are the norm. The result is that nuclear power faces the same fundamental

www.newcivilengineer.com

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Reposted by Mark Z. Jacobson

Christian Breyer @christianonre.bsky.social · 3d

1/ New research @lut.fi presents the first global analysis of inter-annual storage for #100RE systems in 145 regions doi.org/10.1016/j.ap.... Strategic generation overcapacity is a significantly more cost-effective solution than building massive storage.

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 3d

New record battery output of 47.2 GWh on the California ISO grid on Sun 10/5/25. 9.2% of all demand was met by batteries.

Now 191 days of 2025 with > 100% WWS for part of day.

Gas is down 18% v '24, 37% v '23
Solar up 15% v '24, 45% v '23
Demand down 1.7% v' 24, 1% v '23 despite more AI

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Mark Z. Jacobson @mzjacobson.bsky.social · 3d

Mitsubishi debuts 640 kW industrial/commercial heat pump providing hot water up to 90 C and coefficient of performance of up to 4.1 (4.1 units of heat delivered for every 1 unit of electricity used). Can be used for district heating too.

www.pv-magazine.com/2025/10/06/m...

Mitsubishi debuts 640 kW heat pump providing hot water up to 90 C

The ETI-W heat pump, with a coefficient of performance of up to 4.1, utilizes heat emitted from factory production processes as a heat source to supply hot water at up to 90 C. Debuting on the Japanes...

www.pv-magazine.com

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Reposted by Mark Z. Jacobson

Mark Z. Jacobson @mzjacobson.bsky.social · 5d

Wind-Water-Solar pushing out gas in California

Fossil gas down 17.4% year to date in 2025 v '24 and down 37.4% v '23

Wind up 2.1% v '24 and 5.1% v '23
Solar up 15.1% v '24 and 44.8% v '23
Batteries up 58.4% v '24 and 206.4% v '23

Demand down 1.4% v '24 and 1% v '23

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Reposted by Juan Cole

Mark Z. Jacobson @mzjacobson.bsky.social · 6d

A transition to 100% Wind-Water-Solar across all energy sectors in the U.S. requires only 35% of the land used for energy by fossil fuels and biofuels today.

It is current energy that is hogging land. Renewables reduce land use.

www.youtube.com/shorts/ccu-Q...

Busting a myth on how much land is needed for the U.S. to run on 100% renewables vs fossil+biofuels

YouTube video by Mark Z. Jacobson

www.youtube.com

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Mark Z. Jacobson @mzjacobson.bsky.social · 6d

World's largest floating offshore wind turbine - 16 MW - unveiled in China.

"The system will generate about 44.7 million kWh of electricity per year, once fully operational. This is more than enough to power approximately 4,000 average US households."

interestingengineering.com/energy/world...

World's largest floating offshore wind turbine unveiled in China

China has recently unveiled the world's largest floating wind turbine which will be able to power over 4,000 homes each year.

interestingengineering.com

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Reposted by Mark Z. Jacobson

Christian Breyer @christianonre.bsky.social · 6d

1/ New @lut.fi research assesses geopolitical risks associated with 190 countries for sustainable energy trade in future doi.org/10.1016/j.se.... Each country is given a geopolitical risk score based on resilience, institutional quality, conflicts, and business

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Reposted by Mark Z. Jacobson