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bobfromhuddle

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bobfromhuddle
·7 ay önce·discuss
We don't use CO2 to make cement, we use limestone, and CO2 is the byproduct of heating the limestone to make reactive calcium.
bobfromhuddle
·geçen yıl·discuss
Not at any scale that counts. There are a whole bunch of companies _trying_ to make zero carbon cement, but it's all very early stuff.

The lifetime of a cement plant is 30-50 years, and they cost 100-200M Euros to build, so even if there were a process that was ready to scale today, producing a cement that passed regulatory standards, we'd still be making some Portland cement into the 2070s.

Ergo, producers would like to stick a carbon-capture plant onto their kilns.
bobfromhuddle
·geçen yıl·discuss
Yes! Likewise for grinding: offload excess power to industrial plants so they can grind rocks when it's windy. If you look at the problem in the right way, a silo full of ground rock is just a battery.
bobfromhuddle
·geçen yıl·discuss
I work on decarbonising cement production, and the cement producers are betting _heavily_ on carbon capture as their "get out of jail free card".

I think they're likely wrong, but - again - it's not like we can just stop making concrete: all the solar farms, wind farms, dams, and assorted infrastructure that we need to combat climate change will be made with concrete, and there is currently no viable zero carbon alternative.

The grid is the easy bit, and will happen as a result of market forces, but those hard-to-abate sectors are really fricking hard.
bobfromhuddle
·2 yıl önce·discuss
Concrete absorbs co2 while curing. It's the calcination process, where we heat limestone up until the co2 burns off, that has unavoidable emissions. Since this concrete is recycled, that's already happened.
bobfromhuddle
·2 yıl önce·discuss
Billions of people do care https://www.carbonbrief.org/interview-why-global-support-for...
bobfromhuddle
·2 yıl önce·discuss
The emissions trend is slowing. We have the technology we need in order to change course, we're just not deploying it fast enough.

The worst projections, at least, are off the table: we're not headed for 6 degrees of warming, we're on track for 3, and I strongly suspect we'll end up closer to 2 degrees of warming.

That is going to be terrible. People will die, wars will be fought, and we'll see the largest migrations in human history with all the attendant political upheaval and barbarity, but we'll still be here. Humans as a species are going to make it.

For me, I found it helpful to go and work in climate. So long as I wasn't actively working to solve the problem, I was driven mad by the knowledge that we were heading for disaster.
bobfromhuddle
·2 yıl önce·discuss
If you're new to programming, steer clear of design patterns. If you're a working python programmer who's curious about how other ecosystems use design patterns, try https://www.cosmicpython.com/
bobfromhuddle
·7 yıl önce·discuss
And they're free to continue their speech elsewhere. Cloudflare and Voxility are within their rights to refuse service to a client on the basis that the client is persistently associated with terrorism and kiddy porn.

Why is that a remotely controversial statement? Nobody is suggesting that chan-tards should be rounded up for unamerican activities, and I'd be the first to speak against that, but CF don't need to tarnish their brand with 8chans bullshit.

They're free to withhold their support and so express an opinion.
bobfromhuddle
·7 yıl önce·discuss
The difference is that every single one of your counterexamples is something that society depends on.

Nobody depends on 8chan. 8chan is not comparable to "air".

This point is so incredibly banal that I'm surprised to find myself making it.