David Keith
Working on science & policy of climate since ~350 ppm. Technology and policy of solar geoengineering. Also, wilderness travel & environmental activism.
Last synced from Twitter 12m ago
"Sport climbing is neither!"
The Undercling 7d 1 tweets
“Sport climbing is neither.” It’s something that used to be on t-shirts and bumper stickers (and probably still is). But what exactly does it mean? It means that sport climbing is neither a sport nor climbing. It originated in the early days of...
David Keith Irrelevant to most, but for me, "nature-based solutions" are neither echoes "sport climbing is neither” a view that I may have held as a bum in J-tree in ’86. But, now at 56 I think sport climbing is good though I still do trad. 7d
Columbia | SIPA Center on Global Energy Policy | Livestream
Energypolicy.columbia.edu 764d 24 tweets
Can't make an event? Tune in and watch remotely.
The Physics and Ecology of Mining Carbon Dioxide from the Atmosphere by Ecosystems - Baldocchi - - Global Change Biology - Wiley Online Library
Onlinelibrary.wiley.com 344d 3 tweets
Columbia | SIPA Center on Global Energy Policy | Inventing the Future: Zero Carbon Fuels and Climate Restoration
Energypolicy.columbia.edu 15d 1 tweets
Join the Center on Global Energy Policy and Columbia University’s Earth Institute for a discussion with David Keith, PhD, Professor of Applied Physics at the Harvard School of Engineering and Applied Sciences and Professor of Public Policy at the Har
The Peril and Promise of Solar Geoengineering
Hmnh.harvard.edu 43d 1 tweets
Free Public Lecture David Keith, Gordon McKay Professor of Applied Physics, Harvard John A. Paulson School of Engineering and Applied Sciences; Professor of Public Policy, Harvard Kennedy School, Harvard University
Carbon Engineering: CO2 capture and the synthesis of clean transportation fuels
Carbon Engineering 133d 3 tweets
Our business is to provide the technology and facilities to synthesize global-scale quantities of clean fuels from air, water, and renewable power.
David Keith Typo: *not* . Duh! Such a twitter fool mistyped the handle of the company I founded. 42d
Carbon Neutral Hydrocarbons
Keith.seas.harvard.edu 42d 1 tweets
Frank Zeman and David Keith. 2008. “Carbon Neutral Hydrocarbons.” Philosophical Transactions of the Royal Society A, 366, Pp. 3901-3918.
David Keith 2/3 Background: Carbon-Neutral Hydrocarbons . Recent work on renewable hydrogen . H2 will win in some markets, but it has many disadvantages as a fuel. The big $$$ is getting to H2, once there, why not go to hydrocarbons with DAC? 42d
Economics of converting renewable power to hydrogen
Nature Energy 42d 1 tweets
Hydrogen fuel, produced from renewable power, could be critical in the decarbonization of the electricity and transportation sectors. Here, a thorough economic analysis shows that hydrogen obtained from wind power is already cost competitive in...
David Keith 2/3 Background: Carbon-Neutral Hydrocarbons . Recent work on renewable hydrogen . H2 will win in some markets, but it has many disadvantages as a fuel. The big $$$ is getting to H2, once there, why not go to hydrocarbons with DAC? 42d
How to make transportation carbon neutral? - David Keith
YouTube 42d 5 tweets
World's Top 50 Innovators 2019 Royal Society, 23-25 September Future of Mobility Session David Keith, Founder, Carbon Engineering How to make transportation ...
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David Keith 1/3 Cheap intermittent solar power can make carbon-neutral hydrocarbons: high-energy fuels that are easy to store and use. My 12 min talk at Royal Society #CodexTalks describes a low-risk fast path to industrial-scale solar-fuels 42d
Greta Thunberg speaks at Edmonton climate action rally
YouTube 47d 1 tweets
Swedish climate activist Greta Thunberg will speak at a climate action rally at the Alberta Legislature. There will also be a simultaneous counter-protest fr...
David Keith 1/3 Truth-to-power, wonderful speech in Edmonton: Here's 's ignorant response claiming that climate advocates want to "end the modern industrial economy" 47d
Jason Kenney dismisses Greta Thunberg supporters
YouTube 47d 1 tweets
Alberta Premier Jason Kenney dismissed the supporters of climate change activist Greta Thunberg, saying that Canadians wanted real-world, practical solutions...
David Keith 1/3 Truth-to-power, wonderful speech in Edmonton: Here's 's ignorant response claiming that climate advocates want to "end the modern industrial economy" 47d
Climate change emerges as one of the top ballot-box issues among voters: Ipsos poll
Global News 47d 1 tweets
The poll also showed how top issues varied across age groups. For example, close to a quarter of millennials aged 18 to 34 (24 per cent) indicated education was an important issue, while 40 per cent of baby boomers aged 55 years or more cited health...
David Keith Exciting and unusual to have climate as (nearly) top issue in election. "According to Ipsos, climate change had never breached the top three spots in its polls prior to September" #canadavotes2019 47d
Why the World’s First Solar Geoengineering Test Is So Controversial
YouTube 51d 2 tweets
David Keith Terrific overview video from on controversy around solar geoengineering, does the best job in a recent public video in linking lab work to the SCoPEx experiment. via 50d
Heat and Learning
R. Jisung Park 57d 1 tweets
Title: Heat and Learning Authors: R. Jisung Park, Joshua Goodman, Mike Hurwitz, and Jonathan Smith Journal: (forthcoming) American Economic Journal: Economic Policy Latest draft here Abstract We pr…
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David Keith Finally had a look at terrific paper from Jisung Park, . Heat slows learning. Think about implications for poor people in a hot world. Full paper: Press: 57d
Kids learn less on hot days. Global warming is making it worse
Nsikan Akpan - PBS NewsHour 92d 5 tweets
Every 1-degree-Fahrenheit increase in average temperature reduces student learning by 1 percent, a study finds.
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David Keith Finally had a look at terrific paper from Jisung Park, . Heat slows learning. Think about implications for poor people in a hot world. Full paper: Press: 57d
One Thing You Can Do: Talk to Your Children About Climate Change
Nytimes.com 57d 2 tweets
Also this week, how we captured the stark beauty of ghost forests.
David Keith A well-intentioned article that seems to miss the lesson of the hour: Listen to your children. 57d
New consortium brings together solar geoengineering modeling experts | NCAR & UCAR News
News.ucar.edu 100d 3 tweets
David Keith Small but important step to improve collaboration and research prioritization for solar geoengineering modeling. Great to have NCAR taking the lead 100d
Harvard Project to Address Uncertainties in Solar Geoengineering
Seas.harvard.edu 130d 2 tweets
Harvard University researchers have launched a new project, the Stratospheric Controlled Perturbation Experiment (SCoPEx), to explore precisely how particulate matter interacts with the Earth’s upper
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David Keith 1/2 SCoPEx advisory committee announced. See Harvard press release , Statement by committee chair here: And news coverage here: 130d
SCoPEx Advisory Committee Statements
Projects.iq.harvard.edu 130d 1 tweets
FOR IMMEDIATE RELEASEJuly 29, 2019 Statement from Louise Bedsworth, PhD, Executive Director, California Strategic Growth Council On Serving as Chair of the Advisory Committee for the SCoPEx Project Sacramento, CA--I look forward to working with...
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David Keith 1/2 SCoPEx advisory committee announced. See Harvard press release , Statement by committee chair here: And news coverage here: 130d
Geoengineering is very controversial. How can you do experiments? Harvard has some ideas.
James Temple - MIT Technology Review 130d 8 tweets
A new committee will consider the wisdom of outdoor experiments, and may set the stage for more.
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David Keith 1/2 SCoPEx advisory committee announced. See Harvard press release , Statement by committee chair here: And news coverage here: 130d