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Posts by Robert Lepage, PhD., P.Eng.

I am thankful our Supreme Court justices are boooooring.

3 hours ago 2 1 2 0
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COVID-19 was still the largest driver of hospitalizations for vaccine-preventable respiratory diseases in 2024 www.cihi.ca/en/priority-... via @cihica.bsky.social

#VaccinesWork

4 hours ago 60 26 5 1

There's a lot of unresolved, and even unrecognized, societal trauma. It is leading to a whole bunch of really weird, asocial behaviours, like what Richard illustrates below.

4 hours ago 1 0 0 0

As part of our new Super Warrior program, we will be injecting all servicemen with radioactive mantis blood, which will turn our army into unstoppable super mantis warriors!

4 hours ago 2 0 0 0

Oh! COPex constrained?

7 hours ago 1 0 1 0

Energy COPerty? Ugh, I am terrible at this. Need more Java...

7 hours ago 1 0 1 0

I think the reality is this is the CAPEX aspect of energy poverty though.

7 hours ago 1 0 1 0

The Carnot-Afford it divide?

7 hours ago 2 0 1 0

Did you know?

One tonne of carbon dioxide gas weighs the same as one tonne of carbon in solid form!

For more helpful science comms insights, follow @projectdrawdown.bsky.social

1 day ago 0 0 0 0
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an older woman in a blue jacket is saying a win is a win ALT: an older woman in a blue jacket is saying a win is a win

That's a W!

1 day ago 1 0 1 0
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The Western Oil-igarchs would rather burn their kingdoms down rather than relinquish power and live as Lords in a prosperous nation.

1 day ago 1 1 0 0
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Decades of increased emissions from forest-fuelled BECCS - Nature Sustainability Governments are considering subsidies for bioenergy with carbon capture and storage fuelled by wood from existing forests. However, a transparent model estimates that this will probably increase emiss...

Many govts hope capturing carbon from power plants burning wood will cause "negative emissions." New Nature Sust. paper today finds this likely increases emissions for decades, generates no negative emissions within 150 years, and increase electricity costs ~3.5-fold.
www.nature.com/articles/s41...

1 day ago 137 70 4 13

Can we finally agree that burning wood for energy is a terrible idea and won't be carbon neutral, let alone carbon negative, in our lifetimes? BECCS using wood certainly shouldn't qualify as CO₂ removal (CDR).

1 day ago 366 111 16 8

Wondering if @pipedreaming.bsky.social has ever heard of an instance where a closed backwater valve has led to upper storeys of a mid/high-rise backing up lower floors.

The phenomena reportedly occurs on SFD on a slope, per ICLR.

2 days ago 1 0 1 0
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France announces ban on gas boilers in new buildings starting in 2027 French Prime Minister Sébastien Lecornu also announced on Friday a doubling of support for electrification by 2030, from €5.5 billion to €10 billion annually.

VERY BIG NEWS out of France a week ago:
"French Prime Minister Sébastien Lecornu announced on Friday, April 10, a ban on installing gas heating systems "by year's end" in new buildings, including multi-unit housing, to curb France's dependence on fossil fuels."
www.lemonde.fr/en/environme...

2 days ago 244 75 5 5

72hr, usually. ASCE (IIRC) has since been recommending 7+ days of emergency backup, which is difficult.

This is just to deal with the hazards of today, not the hazards that will manifest in 20+ years.

2 days ago 0 0 0 0

Would you like to try this again, but without the strawman?

I try to accord you the respect you deserve.

2 days ago 0 0 0 0

High-rises also present some unique thermodynamic challenges too. Prolonged heat waves with power outages can create heat-hazards in these thermally massive buildings. Depends on a lot of factors, but low and mid-rise have less of a core-vs-shell effect.

2 days ago 1 0 0 0

You are absolutely right. It is just a lot easier to haul a day's worth of water up 4 flights of stairs rather than 20. Or to extract a person suffering acute health illnesses when they are on the 30th floor and the elevators are no longer operational.

2 days ago 1 0 1 0
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Spike in Sewer Backups Leaves New Yorkers in a Soggy Mess, with Long-Term Fixes Years Away New York City is getting rainier and rainier — and its sewer pipes can’t handle it.

Risk management aims to prevent or manage those rare, high impact events. The act of them being rare is problematic because it can often be hard to justify action against it. And when you are successful, no one notices.

But even here, there are signs. NYC combined sewers are problematic.

2 days ago 0 0 1 0
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Is loss of refrigeration, hazardous odours, unsanitary living conditions, and needing to boil water a life-safety issue?

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So then why fabricate a narrative about "buying more land and less dense housing"? No one is talking about that.

Emergency backup power systems typically use generators with min 72hr runtime. They are less expensive than batteries and can be replenished with a tanker truck.

2 days ago 0 0 1 0

Do you consider Paris or Barcelona low density?

2 days ago 1 1 2 0

There's also much more than just electricity. Loss of potable water or sewage rapidly makes a place uninhabitable.

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More than 100k people lost power during NYC’s heatwave last week. Experts say get used to it. | Edward J. Bloustein School of Planning & Public Policy

This is called the Lucretius Problem in risk management circles.

It is also incorrect. NYC regularly suffers power outages.

This is from last year:
bloustein.rutgers.edu/more-than-10...

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What happens under prolonged (72h+) utility disruption?

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The intersection between "Palantir must support US interests uber alles"; "this means exercising hard power via software"; and "Palantir software gets access to everyone's private information across the UK's NHS, plus whatever the Canadian government is doing, etc" is...not reassuring.

2 days ago 24 9 2 0

Their intentional choice to release their white supremacist Technological Republic manifesto is gravely concerning:
bsky.app/profile/ayou...

2 days ago 1 0 1 0

Hey @avilewis.ca, can we start raising a fuss about offloading Canadian autonomy and privacy to a technofascist surveillance company?

2 days ago 2 0 1 0

Yes to everything except the high-rise part. In the face of climate adaptation, anything above 4 to 6 storeys is a life-safety issue.

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