Reposted by David Elfstrom 🍁Mark Ungrin @mark-ungrin.bsky.social · 28/09/2026An absolutely damning report on the unnecessary COVID deaths of workers at the Cargill plant in High River, AB, highlighting public health and infection control's mismanagement of the crisis, and failure to engage OHS or follow the precautionary principle. albertapolitics.ca/wp-content/u... 9204104
David Elfstrom 🍁 @davidelfstrom.bsky.social · 28/09/2026Wow check out the US Treasury yield. That explains why the Canadian dollar has fallen lately too. 010
David Elfstrom 🍁 @davidelfstrom.bsky.social · 23/09/2026It's that (second) time of the year in Toronto when it makes sense to use as much outdoor air as possible in buildings. At the office. Breathing zone CO2 611 ppm at 10:45 AM 1185
Reposted by David Elfstrom 🍁Institute of Health Emergencies & Pandemics @uoftpandemics.bsky.social · 22/09/2026🛡️ As flu season approaches, air filtration remains an important layer of protection against infectious diseases. IHEP member Jeff Siegel @engineering.utoronto.ca) explains how high-efficiency air filtration can help reduce airborne pathogens in shared indoor spaces. 27631
Reposted by David Elfstrom 🍁Julie S. Lalonde @julieslalonde.bsky.social · 17/09/2026There are many, many reasons to feel powerless these days. Everything feels big & scary. But what if you had the confidence to de-escalate situations - even when it's in public with a bunch of strangers? Give me 1 hour of your time & I'll teach it to you for FREE Register: zoom.us/webinar/regi... 26235
Reposted by David Elfstrom 🍁Glendon Mellow @flyingtrilobite.com · 18/09/2026Welcome to the #TOphoto Feed! Photography of Toronto, Canada. Currently an open Feed: use hashtag #TOPhoto for your work to appear. 🦝 No AI 🦝 SFW, please 🦝 Use Alt text 📸 Let's see your best photos 📸 Tap the 3 dots at top-right to Like and Pin the Feed 📸 bsky.app/profile/flyi... 811130
Reposted by David Elfstrom 🍁George Monbiot @georgemonbiot.bsky.social · 17/09/2026A macho culture of performative selfishness might start on the roads, through racing, rolling coal, ever bigger SUVs ... But it doesn't end there. If we want to live in a decent country which values human life, we need to change this culture. My column. www.theguardian.com/commentisfre...theguardian.comDriving that’s too fast, too dangerous and utterly lawless: why do we tolerate this petro-masculinity? | George MonbiotIn towns and in the countryside, I see 4x4s and pick up trucks driven without care or consicence. It’s a Magafication of transport, says Guardian columnist George Monbiot 1151582493
Reposted by David Elfstrom 🍁Bean & Sprout's Mom @beansproutsmom.bsky.social · 16/09/2026The last breath of the aerosol-generating procedure? Scotland's new infection-control guidance and implications for anaesthesia research-information.bris.ac.uk/en/publicati... 29335
Reposted by David Elfstrom 🍁Kanchan @kayehm.bsky.social · 16/09/2026It's not common for Engineers to take a stand on anything (much to my frustration), that's why this statement from OSPE about Bill 212 and the recent court ruling is so important. ospe.on.ca/advocacy/osp...ospe.on.caOSPE Statement: Where Things Stand on Bill 212 and Toronto's Bike LanesExplore the OSPE Statement on Bill 212 and its impact on Toronto's bike lanes and transportation planning. 16531
David Elfstrom 🍁 @davidelfstrom.bsky.social · 15/09/2026Here's Nene Royal with OZONE performing Welcome to the Jungle by Guns N' Roses when SHE WAS 11 YEARS OLD, and Boon the drummer WAS EIGHT YEARS OLD!youtube.comWELCOME TO THE JUNGLE (Guns N' Roses) - Cover by OZONE Kids BandYouTube video by OZONE Band FC 120
Reposted by David Elfstrom 🍁Oh The Urbanity! @ohtheurbanity.bsky.social · 14/09/2026Here’s an angle grinder resistant bike lock on sale at MEC in Canada for $345. This one is on the larger side, good for e-bikes and cargo bikes. Especially ones with larger tubes.mec.ca 3232
Reposted by David Elfstrom 🍁Matt Bors @mattbors.bsky.social · 14/09/2026It was exactly ten years ago today, on my 33rd birthday, that I posted this comic online. 484297717660
David Elfstrom 🍁 @davidelfstrom.bsky.social · 13/09/2026On this day 8 years ago It's a bulldozed wasteland now. 1151
Reposted by David Elfstrom 🍁Serenity Now! @cpo10za.bsky.social · 12/09/2026Great satirical take on the recent AI employee resignation posts. 051
David Elfstrom 🍁 @davidelfstrom.bsky.social · 11/09/2026As the western provinces move to permanent Daylight Savings Time, there's real safety and health concerns. It should really have been permanent Standard Time. Here's what school facilities need to consider:reminetwork.comDark edge awaits Alberta and B.C. school days - REMI NetworkAlberta and B.C. schools days will begin in the dark this fall and winter after the two provinces transition to permanent daylight saving time on Nov. 1 32615
Reposted by David Elfstrom 🍁Canadian History Ehx @cdnhistoryehx.bsky.social · 07/09/2026When a Canadian engineer graduates, they are given an iron ring in a ceremony called The Ritual of the Calling of an Engineer. The tradition dates back a century and includes a connection to Rudyard Kipling and a terrible bridge disaster. This is the story. 📸 TranBC 🧵1/8 320871
David Elfstrom 🍁 @davidelfstrom.bsky.social · 07/09/2026Good article about air cleaner device noise levels (sound pressure vs sound power) by @adamwong.bsky.socialair-fanta.comThe Decibels You Hear May Not Be the Decibels You ThinkWe often talk about noise in terms of decibels, but few people realize that behind this seemingly simple number lie two entirely different measurement frameworks: sound power level and sound pressure ... 274
David Elfstrom 🍁 @davidelfstrom.bsky.social · 07/09/2026Splendid example of #carchitecture Gibeau Orange Julep in Montreal at dusk as viewed from across its parking lot and 15 lanes of traffic. 071
David Elfstrom 🍁 @davidelfstrom.bsky.social · 07/09/2026Duralast brand tactile metal plates for pedestrians in Montreal are either Made in France (if square) or Made in USA (if curved). 030
David Elfstrom 🍁 @davidelfstrom.bsky.social · 06/09/2026@ohtheurbanity.bsky.social Any idea why is there a No Pedestrian sign right next to the crosswalk at the bottom of the stairs to Mount Royal? 020
Reposted by David Elfstrom 🍁Ellie Saurus @elliesaur.bsky.social · 03/09/2026Reasons to ride a bike: - Bikes are fast and get you places on time - Gives you a nice butt - Most energy efficient way to travel - Get to go whee the whole time - Virtually immune to traffic - The going whee thing, but again 39589111
David Elfstrom 🍁 @davidelfstrom.bsky.social · 03/09/2026#BikeTO has anyone found the RFP for "restoring motor vehicle lanes" aka bike lane removal on the Ontario Tenders Portal? 152
Reposted by David Elfstrom 🍁Barry Hunt @barryhunt008.bsky.social · 01/09/2026Heterogeneity of Airborne Virus Transmission in the Built Environment: A Narrative Review This is the best explainer I've seen wrt the engineering parameters of airborne transmission And a must read for anyone involved in healthcare design 👏👏👏 paijournal.com/index.php/pa...paijournal.com Heterogeneity of Airborne Virus Transmission in the Built Environment: A Narrative Review | Pathogens and Immunity 03715
Reposted by David Elfstrom 🍁Jonathan Douglas PhD CPsych @jonathanconp.bsky.social · 30/08/2026Geri currently has 29 followers. Let’s make it 29,000 1219
David Elfstrom 🍁 @davidelfstrom.bsky.social · 29/08/2026How your DM found me this #Caturday morning 1270
David Elfstrom 🍁 @davidelfstrom.bsky.social · 24/08/2026No cheating. Share the last photo of the sky from your camera roll 12160
David Elfstrom 🍁 @davidelfstrom.bsky.social · 23/08/2026Ti Kwan Leep (skit) & Boot To The Head (song) People talking in movie shows People smoking in bed People voting Republican Give them a boot to the head!youtu.beThe Frantics - Boot to the Head - 16. Ti Kwan LeepYouTube video by Jay Ess 282
David Elfstrom 🍁 @davidelfstrom.bsky.social · 23/08/2026What a bunch of weirdos. The tariff list contains many oddly specific items. www.cfib-fcei.ca/en/site/us-t... 2115
Reposted by David Elfstrom 🍁ℳatt @matttomic.bsky.social · 14/08/2026They brought in Dr. Shoshanna Saxe to testify for the pro-bike lane side. Dr. Saxe has a PhD from Cambridge, is a licensed professional engineer, and associate professor at U of T. The judge basically throws out all of her expert testimony as being the biased, arbitrary opinions of a bike lobbyist 48124
Reposted by David Elfstrom 🍁DCapTO @dcapto.bsky.social · 13/08/2026Thanks for the heads up @davidelfstrom.bsky.social! I snagged a few 2-pack 20x20 Filtrete 1900 for my Northbox Corsi-Rosenthal-style air purifier They are indeed normally $64.99 at Canadian Tire & Home Hardware, $51.99 at Rona, but today I paid $26.99 per 2-pack 🙌 Just in time for Fall changeup 🌬️🍂🍁 2102
Reposted by David Elfstrom 🍁Kevin Anderson @kevinclimate.bsky.social · 13/08/2026Long form interview on @novaramedia.com - covering a wide range of climate issues: from the science to the politics, the climate leadership prospects of the new PM and the dangerous soft-pedalling by many climate academics/experts & much of the mainstream media. m.youtube.com/watch?v=mBFo...m.youtube.comEx-Oil Engineer Turned Climate Whistleblower: We Face COLLAPSE | Aaron Bastani Meets Kevin AndersonYouTube video by Novara Media 411747
David Elfstrom 🍁 @davidelfstrom.bsky.social · 11/08/2026Heads up Canadian #crbox builders and PC fan air cleaner enthusiasts – Canadian Tire has a sale on 2-packs of Filtrete 1900 starting Thursday for $26.99 ($13.50 each). Normal price is $64.99, hope they are in stock by then. No rainchecks. @northboxsystems.bsky.social (That's like $9.64 each in USD) 58042
Reposted by David Elfstrom 🍁Conor Browne @brownecfm.bsky.social · 09/08/2026There is a reason why many people you know seem different now. Not quite who they were before. www.psypost.org/brain-scans-...psypost.orgBrain scans reveal widespread structural and functional changes in patients following COVID-19 infectionA systematic review of 49 imaging studies highlights how COVID-19 affects the human brain. Researchers found widespread structural and functional changes in areas responsible for memory, emotion, and ... 14366164
David Elfstrom 🍁 @davidelfstrom.bsky.social · 08/08/2026—How about electro-magnetic launch catapults on aircraft carriers? —No, not like that! 031
David Elfstrom 🍁 @davidelfstrom.bsky.social · 08/08/2026We had a human vaccine for Lyme disease in the 90's that was 80% effective. It got pulled after attacks by anti-vaccine pushback. But your dog can get one. 13748291
Reposted by David Elfstrom 🍁Morgan Fairchild @morgfair.bsky.social · 07/08/2026#OnMyWalk to see the incomparable Sarah McLachlan at The Greek Theatre with my fabulous friend @galeannehurd.bsky.social who is so kind to include me AND is a fellow masker😷 A great show & a great friend! #BeKind Sending Love To You All💗🌷💗🥳💗🎉💗😷💗🌷💗🥳💗🎉💗😷💗🌷💗🥳💗🎉💗😷💗🌷💗 2637336
Reposted by David Elfstrom 🍁Matt Oliver @sameo416.bsky.social · 06/08/2026www.huffpost.com/entry/violet...huffpost.comViolet Affleck Reveals Why She’s Often Seen Wearing A Face Mask In PublicThe teen daughter of Jennifer Garner and Ben Affleck opened up about a personal health condition during an impassioned speech. 14312
Reposted by David Elfstrom 🍁David Ho @davidho.bsky.social · 04/08/2026This might answer your question.pluginsolarus.comUL 3700 Explained: The Safety Standard That Makes Plug-In Solar Legal | PlugInSolarUSUL 3700 is the safety certification every plug-in solar law references. Learn what it covers, why it matters, which systems are certified, and how it differs from UL 1741. 1347
Reposted by David Elfstrom 🍁David Zipper @davidzipper.bsky.social · 04/08/2026A story of cause and effect: Last November, Ontario banned cities from using speed safety cameras to issue tickets. Reckless speeding immediately surged in Toronto, Ottawa, Guelph, and cities throughout the province. A 🧵 about my latest in Bloomberg (gift link)bloomberg.comWhat Happens When Speed Cameras Get Shut OffIn 2025, Ontario banned automated traffic enforcement. Now the number of drivers exceeding the speed limit has surged, according to traffic data. 21462209
Reposted by David Elfstrom 🍁Adam Rawnsley @arawnsley.bsky.social · 04/08/2026Today, August 4, 2026, is the setting of Ray Bradbury’s short story “There Will Come Soft Rains” about a fully automated house continuing on after the family who lived there and the world around it died in a nuclear blast. 10346211517
Reposted by David Elfstrom 🍁Sphagnum Moss @mosssphagnum.bsky.social · 02/08/2026Anyone casting doubt on the effectiveness of filtration on the reduction of respiratory diseases ought to have a word with pig farmers because pigs get appropriately sized air filters in crowded spaces porkgateway.org/resource/pri...porkgateway.orgPrinciples of Air Filtration for Swine Facilities - Pork Information GatewayAir filtration is a commonly used biosecurity practice to minimize the spread of airborne diseases. Common airborne diseases include Porcine Reproductive and Respiratory Syndrome Virus (PRRSV), Mycopl... 44420
David Elfstrom 🍁 @davidelfstrom.bsky.social · 01/08/2026When we booked our Algonquin backcountry trip I was disappointed because a full moon would make for poor stargazing. Had NO idea the full moon would rise in the east opposite in the sky from the sunset an hour earlier. Absolutely stunning. Photos can't really capture it. 2201
Reposted by David Elfstrom 🍁Gil Meslin @gmeslin.bsky.social · 22/07/2026Attention single-stair/missing middle people: as part of OBC review, the Province has opened a consultation on the Building Code, seeking to “identify ways to reduce unnecessary costs, delays, complexity, and administrative burden”. Runs to August 14. ero.ontario.ca/notice/026-0744ero.ontario.caConsultation on Reducing Regulatory Burden in Ontario's Building Code | Environmental Registry of Ontario 24525
David Elfstrom 🍁 @davidelfstrom.bsky.social · 21/07/2026There's still six Tuesdays before August 30. That's six T.A.C.O. Tuesday opportunities. 080
David Elfstrom 🍁 @davidelfstrom.bsky.social · 19/07/2026Unusual failure mode to have a vehicle split in half. Is that intentional, or a consequence of other design choices?yahoo.comCybertruck Split In Half After Moving Truck Slams Into 10 Cars On HighwayA chaotic multi-vehicle pileup in Silver Spring, Maryland left a trail of mangled metal on Saturday afternoon, and one of the more eye-catching casualties was a Tesla Cybertruck that ended up torn cle... 3197
Reposted by David Elfstrom 🍁David Elfstrom 🍁 @davidelfstrom.bsky.social · 18/07/2026Use PM2.5 µg/m3 metrics to compare. Excellent: Air Quality Ontario www.airqualityontario.com/aqhi/locatio... Very good: QuantAQ - use Desktop mode app.quant-aq.com/map Good: Purple Air - map.purpleair.com/air-quality-... & IQAir www.iqair.com/ca/air-quali... 365
David Elfstrom 🍁 @davidelfstrom.bsky.social · 16/07/2026A Redditor put together some instructions on on how to make an optimized 1-filter air cleaner using a box fan from my experimentation several years ago. It's in a Google drive folder here: drive.google.com/drive/folder... 23316