David Keith
@davidkeith.bsky.social
Climate science and technology policy since 1989. Building Climate Systems Engineering at UChicago. Founded Carbon Engineering. Work interferes with my climbing.
Read about me and my work at https://davidkeith.earth/
Read about me and my work at https://davidkeith.earth/
Superb op-ed from Steven Pinker (@sapinker on X) calling out the right's absurd Harvard Derangement Syndrome.
Harvard has some woke, but its peak has passed, and claims of many on the right are disconnected from the reality I saw as a faculty member.
www.nytimes.com/2025...
Harvard has some woke, but its peak has passed, and claims of many on the right are disconnected from the reality I saw as a faculty member.
www.nytimes.com/2025...
May 23, 2025 at 7:37 PM
Superb op-ed from Steven Pinker (@sapinker on X) calling out the right's absurd Harvard Derangement Syndrome.
Harvard has some woke, but its peak has passed, and claims of many on the right are disconnected from the reality I saw as a faculty member.
www.nytimes.com/2025...
Harvard has some woke, but its peak has passed, and claims of many on the right are disconnected from the reality I saw as a faculty member.
www.nytimes.com/2025...
But I'm not opposed people thinking about it, and I'm impressed by the arguments and authors who just published a case for Mars terraforming research.
Article link: www.nature.com/artic...
Open access version: sseh.uchicago.edu/do...
Article link: www.nature.com/artic...
Open access version: sseh.uchicago.edu/do...
May 20, 2025 at 1:59 PM
But I'm not opposed people thinking about it, and I'm impressed by the arguments and authors who just published a case for Mars terraforming research.
Article link: www.nature.com/artic...
Open access version: sseh.uchicago.edu/do...
Article link: www.nature.com/artic...
Open access version: sseh.uchicago.edu/do...
"Donald Trump Tries to Run Harvard", here's an extract from this morning's op-ed in the woke Wall Street Journal:
April 16, 2025 at 12:25 PM
"Donald Trump Tries to Run Harvard", here's an extract from this morning's op-ed in the woke Wall Street Journal:
Read the text of what the Trump Administration demands from Harvard, and imagine what this would mean in practice if Harvard caved
2/5
2/5
April 15, 2025 at 5:10 PM
Read the text of what the Trump Administration demands from Harvard, and imagine what this would mean in practice if Harvard caved
2/5
2/5
April 4, 2025 at 4:32 PM
Nice quote from Govindasamy Bala “A rigorous quantitative risk-risk assessment, like what is done in this paper, is a must before solar geoengineering is ever tested or deployed.”
Also, nice graphics
2/3
Also, nice graphics
2/3
April 4, 2025 at 4:32 PM
Nice quote from Govindasamy Bala “A rigorous quantitative risk-risk assessment, like what is done in this paper, is a must before solar geoengineering is ever tested or deployed.”
Also, nice graphics
2/3
Also, nice graphics
2/3
Good article by @catclifford.bsky.social on our work comparing some of the risks and benefits of sulfate aerosol sunlight reflection.
www.ciphernews.com/a...
1/3
www.ciphernews.com/a...
1/3
April 4, 2025 at 4:32 PM
Good article by @catclifford.bsky.social on our work comparing some of the risks and benefits of sulfate aerosol sunlight reflection.
www.ciphernews.com/a...
1/3
www.ciphernews.com/a...
1/3
Home in Canada, feeling the cold anger against the treaty-breaking yanks.
On Sunday we fantasized about Hydro Quebec pulling the plug on 2.5 GW of power flowing south during the big game.
Retool the '80's AB bumper sticker (image): Eastern -> Southern
On Sunday we fantasized about Hydro Quebec pulling the plug on 2.5 GW of power flowing south during the big game.
Retool the '80's AB bumper sticker (image): Eastern -> Southern
February 11, 2025 at 2:05 PM
Home in Canada, feeling the cold anger against the treaty-breaking yanks.
On Sunday we fantasized about Hydro Quebec pulling the plug on 2.5 GW of power flowing south during the big game.
Retool the '80's AB bumper sticker (image): Eastern -> Southern
On Sunday we fantasized about Hydro Quebec pulling the plug on 2.5 GW of power flowing south during the big game.
Retool the '80's AB bumper sticker (image): Eastern -> Southern
Time to move beyond the most simplistic critiques of these ideas. The quote from Jeremy Bassis implies the world is doing nothing to address the root cause when, in fact, spending on clean energy is now 1.7 % of world's economy and emissions are about to peak.
2/2
2/2
February 10, 2025 at 7:58 PM
Time to move beyond the most simplistic critiques of these ideas. The quote from Jeremy Bassis implies the world is doing nothing to address the root cause when, in fact, spending on clean energy is now 1.7 % of world's economy and emissions are about to peak.
2/2
2/2
Under a not so white sky: visual impacts of stratospheric aerosol injection
New paper out today by Ansar Lemon
TLDR: casual observers would not notice anything different about the sky in a world cooled 1 C with stratospheric sulfates.
iopscience.iop.org/a...
1/6
New paper out today by Ansar Lemon
TLDR: casual observers would not notice anything different about the sky in a world cooled 1 C with stratospheric sulfates.
iopscience.iop.org/a...
1/6
February 6, 2025 at 12:19 AM
Under a not so white sky: visual impacts of stratospheric aerosol injection
New paper out today by Ansar Lemon
TLDR: casual observers would not notice anything different about the sky in a world cooled 1 C with stratospheric sulfates.
iopscience.iop.org/a...
1/6
New paper out today by Ansar Lemon
TLDR: casual observers would not notice anything different about the sky in a world cooled 1 C with stratospheric sulfates.
iopscience.iop.org/a...
1/6
Three takes on Trump, climate, and solar geoengineering from @JesseLReynolds, Jane Long, and me: srm360.org/perspecti...
1/2
1/2
January 24, 2025 at 7:50 PM
Three takes on Trump, climate, and solar geoengineering from @JesseLReynolds, Jane Long, and me: srm360.org/perspecti...
1/2
1/2
A: mortality reduction from cooling is > 10X mortality increase from air pollution and ozone loss caused by SRM sulfate. Benefits are concentrated in warmer regions.
Full paper: www.pnas.org/doi/10....
Explanatory post by me and Tony: davidkeith.earth/com....
Questions?
2/2
Full paper: www.pnas.org/doi/10....
Explanatory post by me and Tony: davidkeith.earth/com....
Questions?
2/2
December 18, 2024 at 3:03 PM
A: mortality reduction from cooling is > 10X mortality increase from air pollution and ozone loss caused by SRM sulfate. Benefits are concentrated in warmer regions.
Full paper: www.pnas.org/doi/10....
Explanatory post by me and Tony: davidkeith.earth/com....
Questions?
2/2
Full paper: www.pnas.org/doi/10....
Explanatory post by me and Tony: davidkeith.earth/com....
Questions?
2/2
New paper by @tonyharding.bsky.social in PNAS with first quantitative risk-to-risk comparison for solar geoengineering (SRM).
Climate has risks that may be reduced by SRM.
SRM with sulfates has risks.
Q: How do the risks compare?
1/2
Climate has risks that may be reduced by SRM.
SRM with sulfates has risks.
Q: How do the risks compare?
1/2
December 18, 2024 at 3:03 PM
New paper by @tonyharding.bsky.social in PNAS with first quantitative risk-to-risk comparison for solar geoengineering (SRM).
Climate has risks that may be reduced by SRM.
SRM with sulfates has risks.
Q: How do the risks compare?
1/2
Climate has risks that may be reduced by SRM.
SRM with sulfates has risks.
Q: How do the risks compare?
1/2
And finally, if you want my opinion on Make Sunsets, check out this clip from the episode. Enough said.
7/7
7/7
November 22, 2024 at 5:21 PM
And finally, if you want my opinion on Make Sunsets, check out this clip from the episode. Enough said.
7/7
7/7
@cbc-news.bsky.social's What on Earth podcast tackles solar geoengineering and @makesunsets.bsky.social. Listen here:
www.cbc.ca/listen/li...
Some notable takeaways from the episode (read below or check out the clip here).
1/7
www.cbc.ca/listen/li...
Some notable takeaways from the episode (read below or check out the clip here).
1/7
November 22, 2024 at 5:16 PM
@cbc-news.bsky.social's What on Earth podcast tackles solar geoengineering and @makesunsets.bsky.social. Listen here:
www.cbc.ca/listen/li...
Some notable takeaways from the episode (read below or check out the clip here).
1/7
www.cbc.ca/listen/li...
Some notable takeaways from the episode (read below or check out the clip here).
1/7
I'm just a symbol in this regard; the important thing this signals is the growing credibility of research and debate about solar geoengineering.
Note that Vox's citation text has little correlation with my views.
2/4
Note that Vox's citation text has little correlation with my views.
2/4
November 21, 2024 at 4:19 PM
I'm just a symbol in this regard; the important thing this signals is the growing credibility of research and debate about solar geoengineering.
Note that Vox's citation text has little correlation with my views.
2/4
Note that Vox's citation text has little correlation with my views.
2/4
November 21, 2024 at 1:45 PM
October 29, 2024 at 3:00 PM
American: "Rase a paw at me, bear, and I will run over and fuck you up. If you even think about growling I will waste you and your scruffy little cubs with my Counter Assault."
counterassault.com/
3/4
counterassault.com/
3/4
October 28, 2024 at 7:21 PM
American: "Rase a paw at me, bear, and I will run over and fuck you up. If you even think about growling I will waste you and your scruffy little cubs with my Counter Assault."
counterassault.com/
3/4
counterassault.com/
3/4
Canadian: "Eh bear, excuse me. You are over there; I am over here minding my own business. How about you back off a bit while I back off a bit holding this little can of spray? Sorry, excuse me, have a good day"
back-offbear.ca/
2/4
back-offbear.ca/
2/4
October 28, 2024 at 7:21 PM
Canadian: "Eh bear, excuse me. You are over there; I am over here minding my own business. How about you back off a bit while I back off a bit holding this little can of spray? Sorry, excuse me, have a good day"
back-offbear.ca/
2/4
back-offbear.ca/
2/4
"We have the impression that more schemes will be proposed for climate control than for control of the climate controllers."
Kellog and Schneider, 1974 in Science
Fair point.
(10.1126/science.186.4170.1163)
Kellog and Schneider, 1974 in Science
Fair point.
(10.1126/science.186.4170.1163)
October 23, 2024 at 8:42 PM
"We have the impression that more schemes will be proposed for climate control than for control of the climate controllers."
Kellog and Schneider, 1974 in Science
Fair point.
(10.1126/science.186.4170.1163)
Kellog and Schneider, 1974 in Science
Fair point.
(10.1126/science.186.4170.1163)
Interesting paper: Political ideology and views toward solar geoengineering in the United States
More talk of solar geoengineering --> less polarization
Also, cool to see Paul @PaulOWennberg playing on the social science court
www.cambridge.org/en...
More talk of solar geoengineering --> less polarization
Also, cool to see Paul @PaulOWennberg playing on the social science court
www.cambridge.org/en...
October 22, 2024 at 8:21 PM
Interesting paper: Political ideology and views toward solar geoengineering in the United States
More talk of solar geoengineering --> less polarization
Also, cool to see Paul @PaulOWennberg playing on the social science court
www.cambridge.org/en...
More talk of solar geoengineering --> less polarization
Also, cool to see Paul @PaulOWennberg playing on the social science court
www.cambridge.org/en...
Want to write about climate engineering?
UChicago's Climate Systems Engineering Initiative is hiring a communications specialist.
uchicago.wd5.myworkd...
UChicago's Climate Systems Engineering Initiative is hiring a communications specialist.
uchicago.wd5.myworkd...
October 16, 2024 at 7:30 PM
Want to write about climate engineering?
UChicago's Climate Systems Engineering Initiative is hiring a communications specialist.
uchicago.wd5.myworkd...
UChicago's Climate Systems Engineering Initiative is hiring a communications specialist.
uchicago.wd5.myworkd...
Recently, I had the pleasure of joining the UnLivable Cultures podcast for a debate with Jeroem Oomen on the Solar Geoengineering Non-Use Agreement. The crux of my issue with the agreement is summed up in the following clip from the episode.
Full episode here: lnkd.in/dM-GCZwi
Full episode here: lnkd.in/dM-GCZwi
October 15, 2024 at 6:59 PM
Recently, I had the pleasure of joining the UnLivable Cultures podcast for a debate with Jeroem Oomen on the Solar Geoengineering Non-Use Agreement. The crux of my issue with the agreement is summed up in the following clip from the episode.
Full episode here: lnkd.in/dM-GCZwi
Full episode here: lnkd.in/dM-GCZwi