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%

As solar and wind boom to record levels, are we ignoring the power of enhanced geothermal energy for electricity?

www.euronews.com/green/2026/0...

Paper:
www.cell.com/cell-reports...
In the race for clean energy, why are geothermal systems ignored?
Geothermal systems that harness heat from deep underground require significantly less land infrastructure than other renewable energies.
www.euronews.com

Reposted by Mark Z. Jacobson

Nuclear industry "fizzling out"

In 2025, ~500x more solar+wind added (793 GW) than net new nuclear (1.6GW=4.4GW added-2.8GW retired).

Fewest additions since 2017

5 fewer reactors 2025 than 2024

Number of countries building reactors declined from 16 to 11 in 2 y

theecologist.org/2026/jan/28/...
Nuclear industry 'is fizzling out'
Investors take note: nuclear power has spent 25 years in stagnation, while renewable energy has seen unprecedented growth.
theecologist.org

Streak continues.

It's still winter, and more than 50% (17/33) of the days in 2026 with >100% WWS for part of the day, and 5 days straight, in CA

Gas down 58% in 2 y

Demand continues to decline

Batteries meeting demand for more hours at night

As if on cue

National lab projects enhanced geothermal cost could decline to $100/MWh by 2035

pv-magazine-usa.com/2026/02/02/n...

Reposted by Mark Z. Jacobson

8.What Doesn’t Help
9.Electricity Grids
10.PV and Solar Radiation
11.Onshore and Offshore Wind Energy
12.Steps in Developing 100 Percent WWS Roadmaps
13.Keeping the Grid Stable With 100 Percent WWS 14.Timeline and Policies Needed to Transition
15.My Journey
15.My

TOC
1.What Problems Are We Trying to Solve?
2.WWS Solutions For Electricity Generation
3.WWS Solutions For Electricity Storage
4.WWS Solutions For Transportation
5.WWS Solutions For Buildings
6.WWS Solutions For Industry
7.Solutions for NonEnergy Emissions
7.Solutions

We still don’t need miracle technologies to save the planet. We have what we need. Let’s work together to solve the problem.

web.stanford.edu/group/efmh/j...

Reposted by Mark Z. Jacobson

Yes, any length of time during a day.

Reposted by Mark Z. Jacobson

January ends with a bang on the California ISO grid

15th 100% Wind-Water-Solar day of the year, and for over 5 hours. Batteries supplied power for over 10 hours during the night

Gas down 58% in 2 y

Gas replaced by WWS/batteries/imports. Imports ~58% WWS. The gas they replace is 0% WWS

They all increase CO2, pollution, and costs vs using the same funds and energy to replace fossil sources. No difference, except in amounts.

No, imports are 58% WWS, so every kWH of import eliminates 58% of emissions

Reposted by Mark Z. Jacobson

Geothermal energy could beat nuclear, coal to meet AI power, cut fossil fuel costs by 60%

EGS could help reduce the need for wind, solar, and battery storage and operate 24/7

interestingengineering.com/energy/geoth...

The paper:
web.stanford.edu/group/efmh/j...
Geothermal energy could beat nuclear, coal to satiate AI power hunger
A new Stanford Univesity study claims that a new kind of geothermal power could reduce dependance on coal and nuclear with no downsides.
interestingengineering.com

Reposted by Mark Z. Jacobson

Reposted by Mark Z. Jacobson