David Elfstrom(@DavidElfstrom) 's Twitter Profileg
David Elfstrom

@DavidElfstrom

P.Eng, Energy management, measurement & verification. Born @ 327 ppm CO₂. Safer infrastructure, #ventilation, #CorsiRosenthalBox
Also @ https://t.co/SDMtkE22wf & spout & bsky

ID:22317663

linkhttps://elfstrom.com calendar_today01-03-2009 01:17:15

19,2K Tweets

16,5K Followers

1,3K Following

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Al Haddrell(@ukhadds) 's Twitter Profile Photo

Ruth Brooker I've heard from so many people that CO2 they see in UK classrooms is around 3,000ppm. It's one of the reasons we measured the long decay at that level. At that level, in effect, the final 10-20% of the exhaled viral load just kind of stops decaying, and begins to accumulate.

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Toronto Star(@TorontoStar) 's Twitter Profile Photo

Canada needs to improve indoor air quality for kids as an early wildfire season looms, advocates say trib.al/6X4KQlb

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Jody Lanard MD(@EIDGeek) 's Twitter Profile Photo

5/5 When WHO hired me to draft a set of proposed 'outbreak communication guidelines' in 2004, the summary of the long document listed 6 proposals, ending with 'Admit and apologize for errors.'
Member states voted on the guidelines -- and voted not to include that last one.

5/5 When WHO hired me to draft a set of proposed 'outbreak communication guidelines' in 2004, the summary of the long document listed 6 proposals, ending with 'Admit and apologize for errors.' Member states voted on the guidelines -- and voted not to include that last one.
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David Elfstrom(@DavidElfstrom) 's Twitter Profile Photo

It's not getting any better. The Y axis was increased to make room for the higher values.
climatereanalyzer.org/clim/sst_daily/

It's not getting any better. The Y axis was increased to make room for the higher values. climatereanalyzer.org/clim/sst_daily/
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David Elfstrom(@DavidElfstrom) 's Twitter Profile Photo

Jim Rosenthal Feel free to report this article: msn.com/en-us/travel/n… Use the three dots on the side to report AI generated advertising or promotion, incorrect information, nonsensical text.

@JimRosenthal4 Feel free to report this article: msn.com/en-us/travel/n… Use the three dots on the side to report AI generated advertising or promotion, incorrect information, nonsensical text.
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Amanda Hu(@amandalhu) 's Twitter Profile Photo

Omg omg omg it’s happening. Vitacore has released its CAN99 headband respirator in black shop.vitacore.ca/products/can99…

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nobody(@imaguid) 's Twitter Profile Photo

Kimberly Prather, Ph.D. 𝙹𝚘𝚎 𝚅𝚒𝚙𝚘𝚗𝚍 [email protected] Prasad Kasibhatla if there were 5 stages of grief for ones credibility after making a mistake that cost that many lives, i think trying to get everyone to agree on new terminology looks like 'bargaining'

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Cheryl White(@LadyScorcher) 's Twitter Profile Photo

Health task force blasted over ‘dangerous guidance’ for cancer screenings

They absolutely should be blasted. The dogmatic pursuit of RCTs and RCTs only is ignoring more recent and relevant science. Canadians are suffering and dying. globalnews.ca/news/10423697/…

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David Elfstrom(@DavidElfstrom) 's Twitter Profile Photo

This is a great examination of how Google SEO & affiliate reviews together with false claims have resulted in mediocre overpriced products from unknown brands being top sellers within a year. It's disgusting.

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Dad Jokes(@Dadsaysjokes) 's Twitter Profile Photo

Two giant windmills are out on a hilltop.
One turns to the other and asks, 'What kind of music do you like? '

The other one says, 'I'm a really big metal fan.'

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David Elfstrom(@DavidElfstrom) 's Twitter Profile Photo

Was truly not expecting such an enormous temperature drop of 10°C down and back up again during the . Emotional suspense caused by a cloud bank in the three minutes before totality, it passed with just seconds before totality began! Thank you Barry Hunt - #DavosSafe

Was truly not expecting such an enormous temperature drop of 10°C down and back up again during the #Eclipse2024. Emotional suspense caused by a cloud bank in the three minutes before totality, it passed with just seconds before totality began! Thank you @BarryHunt008
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Ontario's IESO(@IESO_Tweets) 's Twitter Profile Photo

The ended for Ontario at around 4:30 PM EDT. Ontario’s solar generation dropped from about 1,800 MW to about 70 MW as the IESO secured other generation to compensate.

The #Eclipse2024 ended for Ontario at around 4:30 PM EDT. Ontario’s solar generation dropped from about 1,800 MW to about 70 MW as the IESO secured other generation to compensate.
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David Elfstrom(@DavidElfstrom) 's Twitter Profile Photo

New: Airborne disease transmission risks on public transit buses: Impacts of ridership, duration, and mechanical filtration using a relative risk metric
sciencedirect.com/science/articl…

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Brent Toderian(@BrentToderian) 's Twitter Profile Photo

A new 5 yr Belgian study shows the BIG impact of increasing vehicle weight on road deaths & injuries. When a person on a bike or walking is hit by a pick-up, the risk of serious injury increases by 90% compared to a car. The risk of death goes up by 200%.
vias.be/fr/newsroom/de…

A new 5 yr Belgian study shows the BIG impact of increasing vehicle weight on road deaths & injuries. When a person on a bike or walking is hit by a pick-up, the risk of serious injury increases by 90% compared to a car. The risk of death goes up by 200%. vias.be/fr/newsroom/de…
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