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%

Reposted by Mark Z. Jacobson

WWS also creates 25 mil more jobs than lost, uses less land & results in much less mining

Lower costs, better health, better climate, more jobs, less land, less mining, more energy security. No downside

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

Why a Transition to 100% Wind-Water-Solar Improves Your Life

It reduces world energy costs by $10t/y in 2050. Since upfront cost is $60 t -> 6 y payback time

Also saves $30 t/y in health costs & $30 t/y in climate costs, so total savings $70t/y -> 1 y payback

www.youtube.com/shorts/-7SMS...
x.com

Another picture-perfect weekend in California

WindWaterSolar met >100% of demand for parts of 216th & 217th days of 2025.

Fossil gas down 37.3%, solar up 42.6%, batteries up 198%, demand down 1.4% vs '23

Average of 3.8 h/day > 100% WWS among all days in '25 v 0.7 h/day in '23

This is why all new homes especially should have solar and batteries. Eliminate almost all need for grid electricity, so free energy after 5-10 years of payback

All-Electric Homes Save Money & Improve Health

There is no reason to have fossil gas in your home. Electricity can do everything gas can do but cheaper, cleaner & more efficiently. All gas does is burden us with high costs & bad health for the rest of our lives
www.youtube.com/shorts/uSacJ...
All-Electric Homes Save Money and Improve Health
YouTube video by Mark Z. Jacobson
www.youtube.com

Wind kicks in to push California to >100% WindWaterSolar for 215th day (out of 310) in 2025

Gas down 17.5% v '24 & 37.4% v '23
Solar up 15% v '24 & 43% v '23
Batteries up 56% v '24 & 198% v '23

61.4% of demand in '25 met by WWS (54% in-state +7.5% imports=58% of 12.9% imports)

From the last graph, it is clear that WindWaterSolar follows load (demand) seasonally far better than does a baseload (flat) electricity source such as nuclear or coal.
Every day is a new record.

Two more 100% WindWaterSolar days for part of the day in CA, making it 213 100% days so far in 2025.

CA will be 100% WWS 24/7/365 by 2037.

PV and batteries are replacing gas rapidly.

Gas down 18% versus 2024 and 37.4% versus 2023.

Every day is a new record.

Two more 100% WindWaterSolar days for part of the day in CA, making it 213 100% days so far in 2025.

CA will be 100% WWS 24/7/365 by 2037.

PV and batteries are replacing gas rapidly.

Gas down 18% versus 2024 and 37.4% versus 2023.

Reposted by Juan Cole

After 10 months of '25, we have ~7 months (211 days) with WindWaterSolar powering >100% of CA's main grid for part of the day

And look: Little wind Sat day but still 100% WWS

Gas down 18% v '24; 37% v '23
Demand down 2% v '24; 1.4% v '23
Solar up 15% v '24; 43% v '23
Batt up 56% v '24; 199% v '23

Reposted by Mark Z. Jacobson

1/ New @lut.fi research investigates Shetland's energy future, finding it can reach #100RE & become a green e-hydrogen export hub for #Europe by 2050. doi.org/10.1016/j.en.... Potential to export over 626 TWh (H2,LHV) annually at a competitive cost of 77.6 €/MWh (H2,LHV).

Reposted by Mark Z. Jacobson

Busting a Myth:
Clean, Renewables Lower Electricity Prices

11 US states met 51-120% of their electricity demand for the year between mid 2024-2025 with just clean, renewable sources. Of these, 10 had electricity prices at least 2 c/kWh below the US avg

www.youtube.com/shorts/deygz...
Busting a Myth: Clean, Renewables Lower Electricity Prices
YouTube video by Mark Z. Jacobson
www.youtube.com

My talk to the Elders Climate Action Group on what is needed to transition the world to 100% clean, renewable, energy across all energy sectors; what has been done to date; and what rate countries, states, and the world are transitioning.

Some surprises

www.youtube.com/watch?v=YOXw...
Oct National Call 100% Clean, Renewable Energy and Storage for Everything with Mark Jacobson
YouTube video by Elders Climate Action
www.youtube.com

Another 6 days straight and 208 of 300 in 2025 with WindWaterSolar powering CA's main grid for part of the day

CA 54.24% in-state WWS for all of 2025, 3.87% higher than last year's 50.37%. At this rate, CA will be 100% WWS 24/7/365 by 2036.

Gas down 18.5% v '24 & 37.4% v '23