Robert Lepage, PhD., P.Eng.
@rtmlepage.bsky.social
Building Science Engineer + Climate Resilience Geek.
Of the 347ppm generation. He/him.
Of the 347ppm generation. He/him.
Had a great opportunity to talk climate change and engineering at #EngCon2025 hosted by the Ontario Society of Professional Engineers.
November 5, 2025 at 6:26 PM
Had a great opportunity to talk climate change and engineering at #EngCon2025 hosted by the Ontario Society of Professional Engineers.
Pumpkin carving time.
October 30, 2025 at 12:20 PM
Pumpkin carving time.
We were there too this morning!
October 18, 2025 at 9:20 PM
We were there too this morning!
I may not get invited back to the children's Art Factory mannequin painting room...
October 8, 2025 at 2:52 PM
I may not get invited back to the children's Art Factory mannequin painting room...
It is nice to see Monarchs again. They were a rare sighting these past few years.
September 13, 2025 at 12:38 AM
It is nice to see Monarchs again. They were a rare sighting these past few years.
I might be born in the wrong century. But to me, this is degrowth. The scuttle, brush, and razor are less efficient than cartridges, but they will be with me for most of my life. Shaving has gone from a tiring chore to a skill developing moment of meditation.
September 13, 2025 at 12:33 AM
I might be born in the wrong century. But to me, this is degrowth. The scuttle, brush, and razor are less efficient than cartridges, but they will be with me for most of my life. Shaving has gone from a tiring chore to a skill developing moment of meditation.
Fair thee well, my old friend. It's time to put you 📌 out to pasture.
September 8, 2025 at 6:06 PM
Fair thee well, my old friend. It's time to put you 📌 out to pasture.
Oh noes, it's the end of the world!
/s
/s
August 26, 2025 at 2:58 PM
Oh noes, it's the end of the world!
/s
/s
Feeling blessed that the air isn't currently toxic to breathe.
August 24, 2025 at 8:03 PM
Feeling blessed that the air isn't currently toxic to breathe.
The reason I can't afford a house?
I have a downpayment's worth of pine nuts in this pesto.
I have a downpayment's worth of pine nuts in this pesto.
August 15, 2025 at 4:50 PM
The reason I can't afford a house?
I have a downpayment's worth of pine nuts in this pesto.
I have a downpayment's worth of pine nuts in this pesto.
Status update on wildfire smoke in Southern Ontario. Appropriate beer.
August 3, 2025 at 3:23 PM
Status update on wildfire smoke in Southern Ontario. Appropriate beer.
I was using NRCan's latest climate adjusted species distribution maps, and some of the suggested distribution ranges are... shocking.
Here's Picea abies (white spruce). It's going into soil where P. abies can't grow.
Here's Picea abies (white spruce). It's going into soil where P. abies can't grow.
August 1, 2025 at 3:28 PM
I was using NRCan's latest climate adjusted species distribution maps, and some of the suggested distribution ranges are... shocking.
Here's Picea abies (white spruce). It's going into soil where P. abies can't grow.
Here's Picea abies (white spruce). It's going into soil where P. abies can't grow.
Got a chance to see a lovely Riëse and Muller bakfiets. I am a bit jealous of the cargo space. Our Butcher and Bicycle Mk1-e is super stable and a great ride, but the foot well makes it harder to load up with larger boxes.
July 20, 2025 at 12:44 AM
Got a chance to see a lovely Riëse and Muller bakfiets. I am a bit jealous of the cargo space. Our Butcher and Bicycle Mk1-e is super stable and a great ride, but the foot well makes it harder to load up with larger boxes.
Taken at 0830hr on July 14, 2025, in Kitchener-Waterloo.
A 24 hour exposure of 22.5ug/m3 is equivalent to the health impacts of smoking 1 cigarette.
A 24 hour exposure of 22.5ug/m3 is equivalent to the health impacts of smoking 1 cigarette.
July 14, 2025 at 1:46 PM
Taken at 0830hr on July 14, 2025, in Kitchener-Waterloo.
A 24 hour exposure of 22.5ug/m3 is equivalent to the health impacts of smoking 1 cigarette.
A 24 hour exposure of 22.5ug/m3 is equivalent to the health impacts of smoking 1 cigarette.
This figure (AR6 WG3 Chp 12) shows 'Buildings' as part of the CDR portfolio. It's makes bldgs seem as viable strategies to store carbon, especially with short-cycle biomass (e.g. grasses).
But Brunner et al (2024) suggest you need centuries of storage. wbLCA says bldgs last 50 years.
But Brunner et al (2024) suggest you need centuries of storage. wbLCA says bldgs last 50 years.
July 11, 2025 at 1:38 PM
This figure (AR6 WG3 Chp 12) shows 'Buildings' as part of the CDR portfolio. It's makes bldgs seem as viable strategies to store carbon, especially with short-cycle biomass (e.g. grasses).
But Brunner et al (2024) suggest you need centuries of storage. wbLCA says bldgs last 50 years.
But Brunner et al (2024) suggest you need centuries of storage. wbLCA says bldgs last 50 years.
Regular reminder to all the #greenbuilding #climate mitigation folks: IPCC AR6 WGIII Chapter 12 says that CDR only refers to anthropogenic activities that remove CO2 from the atmosphere and store it durably in geological, terrestrial, or oceanic reservoirs.
Buildings & products do not count.
Buildings & products do not count.
July 11, 2025 at 1:10 PM
Regular reminder to all the #greenbuilding #climate mitigation folks: IPCC AR6 WGIII Chapter 12 says that CDR only refers to anthropogenic activities that remove CO2 from the atmosphere and store it durably in geological, terrestrial, or oceanic reservoirs.
Buildings & products do not count.
Buildings & products do not count.
And famine and drought! Also pestilence. And these bring along a fourth: war caused by scarcity. This is going to be one hell of a party with the 5th member joining:
July 11, 2025 at 12:04 PM
And famine and drought! Also pestilence. And these bring along a fourth: war caused by scarcity. This is going to be one hell of a party with the 5th member joining:
I couldn't find a gif of the Pteranodons (perhaps too niche?), but here's a static image of the scene:
July 10, 2025 at 3:06 PM
I couldn't find a gif of the Pteranodons (perhaps too niche?), but here's a static image of the scene:
This is a figure from a bit out of date document but it outlines priorities for measures that achieve differing levels of adaptation and mitigation.
www.sfu.ca/act/reports/...
www.sfu.ca/act/reports/...
July 6, 2025 at 11:24 PM
This is a figure from a bit out of date document but it outlines priorities for measures that achieve differing levels of adaptation and mitigation.
www.sfu.ca/act/reports/...
www.sfu.ca/act/reports/...
Here we go!
Outside and inside readings of PM2.5, with the inside picture including with a computer fan Corsi-Rosenthal box. @corsiaq.bsky.social
Outside and inside readings of PM2.5, with the inside picture including with a computer fan Corsi-Rosenthal box. @corsiaq.bsky.social
June 5, 2025 at 8:42 PM
Here we go!
Outside and inside readings of PM2.5, with the inside picture including with a computer fan Corsi-Rosenthal box. @corsiaq.bsky.social
Outside and inside readings of PM2.5, with the inside picture including with a computer fan Corsi-Rosenthal box. @corsiaq.bsky.social
Happy #wildfire #smoke season to all those who observe.
Fun fact, PM2.5 are particles so tiny they seep into your blood through your lung alveoli. These particles then oxidize the inside of your blood vessels causing all sorts of damage. Wildfire smoke is a major source of heart attacks and stroke.
Fun fact, PM2.5 are particles so tiny they seep into your blood through your lung alveoli. These particles then oxidize the inside of your blood vessels causing all sorts of damage. Wildfire smoke is a major source of heart attacks and stroke.
June 4, 2025 at 11:56 PM