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21 May, 6 tweets, 2 min read
Lead is terrible for humans, folks. Let's get rid of those pipes ASAP.
Also, many people don't know that lead is still allowed in aviation gasoline, because the FAA thinks "no safe alternative is currently available". faa.gov/news/fact_shee…
With the advent of electrified light planes, though, we now have a safe and superior alternative. cnn.com/travel/article…
It's happening! aerotime.aero/25091-cessna-e…
Even retrofits are happening! greentechmedia.com/articles/read/…
Electric light planes are far quieter and far more reliable than those powered by aviation gasoline. This is a market segment that should be electrified ASAP, to capture those benefits and phase out leaded gasoline. #ElectrifyEverything

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More from @jgkoomey

Jonathan Koomey Profile picture
21 May
As one of the coauthors of a rebuttal to this nonsense article I can attest to the fact that this study by Mora et al. is widely cited even now.
Our rebuttal: Masanet, Eric, Arman Shehabi, Nuoa Lei, Harald Vranken, Jonathan Koomey, and Jens Malmodin. 2019. "Implausible projections overestimate near-term Bitcoin CO2 emissions." Nature Climate Change. vol. 9, no. 9. 2019/09/01. pp. 653-654. [doi.org/10.1038/s41558…]
We reproduced the authors' model almost exactly, so we know what they did. We showed that their conclusions made no sense in several ways, but the authors just denied the validity of our valid points in their riposte to our rebuttal.
Read 10 tweets
Jonathan Koomey Profile picture
20 May
Setting a coal phase-out date (2030 or sooner for developed countries) is the most important single step most nations can take on climate. Of course it's not the only necessary step, but it's a big one.
This is another example of a critically important constraint on the supply side (it's not just about reducing demand).
Green, Fergus, and Richard Denniss. 2018. "Cutting with both arms of the scissors: the economic and political case for restrictive supply-side climate policies." Climatic Change. 2018/03/12. [doi.org/10.1007/s10584…]
Read 15 tweets
Jonathan Koomey Profile picture
28 Apr
@rustneversleepz That was a widely cited article but it wasn’t state of the art at the time. I emailed Socolow in 2009 to explain his mistake of saying keeping emissions constant was a reasonable goal which he said elsewhere also. Still have the email.
@rustneversleepz This was state of the art in 2003, from @KenCaldeira Caldeira, Ken, Atul K. Jain, and Martin I. Hoffert. 2003. "Climate Sensitivity Uncertainty and the Need for Energy Without CO2 Emission " Science. vol. 299, no. 5615. pp. 2052-2054. <sciencemag.org/cgi/content/ab…>
@rustneversleepz @KenCaldeira This was state of the art in 1989 (!): Krause, Florentin, Wilfred Bach, and Jon Koomey. 1989. From Warming Fate to Warming Limit: Benchmarks to a Global Climate Convention. El Cerrito, CA: International Project for Sustainable Energy Paths. <files.me.com/jgkoomey/9jzwgj>
Read 7 tweets
Jonathan Koomey Profile picture
28 Apr
OK, #energytwitter, I'm wondering if anyone has recent references giving data on embodied/embedded/manufacturing emissions for electronic devices of all types.
This is great, but it's 8 years old now: Teehan, Paul, and Milind Kandlikar. 2013. "Comparing Embodied Greenhouse Gas Emissions of Modern Computing and Electronics Products." Environmental Science & Technology. vol. 47, no. 9. 2013/05/07. pp. 3997-4003. doi.org/10.1021/es3030…
This looks good: Clément, L-P P. V. P., Quentin E. S. Jacquemotte, and L M. Hilty. 2020. "Sources of variation in life cycle assessments of smartphones and tablet computers." Environmental Impact Assessment Review. vol. 84, 2020/09/01/. pp. 106416. sciencedirect.com/science/articl…
Read 4 tweets
Jonathan Koomey Profile picture
26 Apr
The GOP is a cult, episode 1,000,000.
When you’re dealing with delusional people, rational arguments don’t work, and straight up mockery is the best option.
The presumption of good faith is a weapon, but we can take that weapon away by relentlessly mocking crazy delusional beliefs.
Read 5 tweets
Jonathan Koomey Profile picture
24 Apr
Lyman is right here. Travel bans are an important part of pandemic response, and the more quickly they're implemented in a pandemic, the better off we'll be.
Of course, they are one part of a more comprehensive strategy that involves getting to zero transmission, extensive testing and tracing, masking, and eventually vaccines. Travel bans themselves won't do the job, but as part of a strategy to get to zero transmission, they work.
Related: The idea of "managing" respiratory pandemics is invalid. Getting to zero transmission (as NZ, Australia, and the Canadian Atlantics have done) is the right goal, and we need to remember that for next time.
Read 4 tweets

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