Jeremiah Johnson
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jxjohnson.bsky.social
Jeremiah Johnson
@jxjohnson.bsky.social
Decarbonization, energy systems, life cycle assessment • Prof at NC State • KIETS Climate Leaders Program Senior Faculty Fellow • (Former) Author for National Climate Assessment 6
20 calories of water, obviously
July 12, 2025 at 4:58 PM
Fascinating interactive. Thanks.

My premiums shot up 43% this year (Raleigh, NC), after hikes of 20% and 24% the past two years. Home insurance premiums may be one of the most direct ways that many Americans experience the impacts of climate change that has already occurred.
June 18, 2025 at 12:33 PM
At 50% above the necessary volume.
June 11, 2025 at 9:26 PM
Thanks for sharing your thoughts on this!
May 30, 2025 at 7:38 PM
Wrong person tagged! That’s not my timeline.
May 30, 2025 at 7:36 PM
🤣

thanks for sharing this!
May 30, 2025 at 4:27 PM
Lead author @gmmouat.bsky.social is on BlueSky! Follow this guy, post haste.
May 28, 2025 at 3:08 PM
Both scenarios get us half way to net-zero and result in little difference in overall energy system cost (only +0.7% to pursue State Action).

Even with little expectation of federal climate action in the near-term, states can still achieve substantial and cost-effective emissions cuts.
May 27, 2025 at 8:19 PM
So emissions sneaking across borders can undercut state-level climate action.

In the absence of federal leadership, net-zero states will need to consider the embedded carbon of their electricity and biofuel imports.
a person is opening a box of milky way
ALT: a person is opening a box of milky way
media.tenor.com
May 27, 2025 at 8:19 PM
Transmission and interregional trade can lead to leakage.

Under State Action, the North Central region imports fossil-based electricity from the unconstrained Central region.

But under State Action, California increases electricity imports from the Southwest and spurs out-of-region renewables.
May 27, 2025 at 8:19 PM
State-led action = more electrification.

Under State Action, we see more EVs, heat pumps, and electrified industry in participating states, requiring +900 TWh/year over National Action. But non-participating states retain a fair amount of natural gas and coal generation without a federal cap.
May 27, 2025 at 8:19 PM
We modeled two scenarios using Temoa:
• State Action: net-zero by 2050 in 23 politically-willing states
• National Action: same CO₂-eq reduction but achieved with a nationwide cap

Both reduce emissions 46% by 2050, but with very different tech pathways.
May 27, 2025 at 8:19 PM
April 14, 2025 at 12:59 PM
I feel like this headline should be from 2010. From my experience, nuclear is not remotely controversial with most current college students.
April 10, 2025 at 11:11 PM
The paper offers much more detail into the technology choices and system-wide abatement costs. Check it out!

Thanks to @sloanfoundation.bsky.social, Environmental Research: Energy @ioppublishing.bsky.social, and collaborators (@paulijllo.bsky.social @clameron.bsky.social @katiehjordan.bsky.social)
March 5, 2025 at 3:53 PM
Electrification (think heat pumps and EVs) decisions were optimized within the model and varied based on carbon cost. At $400/t—sufficient to achieve net-zero emissions by 2050—U.S. electricity generation more than doubles compared to today to most cost-effectively reduce emissions.
March 5, 2025 at 3:53 PM