Recent comments in /f/UpliftingNews

Ilookbetterthanyou t1_jdfq6yr wrote

That actually happened to me and I almost killed my baby brother because of it. We were 3 and 7 at the time. I saw my brother fall in a pond in a neighbours yard, I dove in after him forgetting I couldn't swim. The neighbour saw me drowning and safed me, but he didn't know my brother was in there too. I swallowed water so couldn't speak coherently for a few seconds but eventually managed to say my brother was in there, he dove immediately and saved him as well. That was more than 30 years ago and I remember it like it was yesterday.

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softcore_UFO t1_jdfnkup wrote

My sister did this to me in a pool, I ended up holding my breath long enough to sort of… shuttle her crazy ass to the edge. Fast forward twenty years later we’re at a family thing and she says, “remember that time you almost drowned me?”. Little shit freaked out so bad she rewrote her memory.

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Itsumishi t1_jdflgn0 wrote

Sequestering carbon from the air is only a small element in this particular trial (and to be honest I suspect that's a journalistic error).

The bulk of carbon emissions in the manufacture of concrete come from the processes which occur during the creation of cement. There's two elements to this:

  • Current methods of creating cement involve heating limestone and clay to around 1400 degrees Celsius. Its hard to hit these temperatures without large inputs of fossil fuels.
  • The chemical process which occurs within the limestone during this baking releases A LOT of CO2. (This is the most carbon intensive bit).

So to achieve lower carbon intensity, we need new methods of producing concrete that use significantly less cement (which is how this trial aims to achieve the bulk of its CO2 reductions); and/or we can capture some of the CO2 from the limestone and embed the carbon back into the concrete.

Pulling it from the air does seem incredibly inefficient when the concentrations will be much higher in the exhaust and waste gasses than the atmosphere. This is where I think the journalistic error occurs. The article says they'll use the AirCapture technology - but I suspect they'll use that technology within a closed system - not just pulling it from the nearby atmosphere.

And yeah - it still won't be carbon neutral, but a significant reduction in a very carbon intensive process is still better than not doing it.

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Itsumishi t1_jdfjx2p wrote

I'll assume you meant "underestimate" regarding the expense, and on that I'd just say new technologies are always expensive. The point of pilots projects etc will be to find methods which can be made cost-effective.

On the "how much carbon it actually takes to make" comment... well its not low-carbon if it takes lots of carbon - so that doesn't make any sense.

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TheNoHeadacheEscape t1_jdfhfnt wrote

>She was kicking and flailing under water and hitting him because she was freaking out.

Not humblebragging, but when I was about 13 I saved a drowning kid (couldn't have been over 7) who swam out too far.

Kid did the same thing and almost brought me under with him, it's a miracle we even made it back to shore, especially considering the amount of times he kicked me in sensitive areas, but the adrenaline rush of almost drowning kinda muted the pain from those.

Definitely do not recommend.

Edit: To note, I didn't know what I was doing, I had no training, I just reacted, and honestly, that was the biggest mistake. I should've grabbed a floatie or something.

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