Recent comments in /f/UpliftingNews

hangryhyax t1_jda2rtb wrote

I get the criticism of zoos, but it’s worth noting that they’re not all bad. In this instance, the tortoises are critically endangered due to the illegal pet trade, so putting them back out in the wild is most likely a death sentence for them, or they’ll end up in the pet trade where they won’t be able to be a part of reproduction/repopulation efforts.

There’s also this:

> A portion of each Zoo membership and admission goes toward helping the Zoo’s partners in Madagascar replant wildlife habitat to save animals in the wild.

From the zoo’s site.

Having animals in captivity purely for entertainment/profit is objectively bad. Having them in captivity because they’d otherwise be extinct (at the hands of people) is less bad.

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Itsumishi t1_jd9p1xi wrote

It also sounds like the vast bulk of the CO2 reduction comes not from the capture of carbon from the air, but changing the chemical composition of the concrete (using significantly less cement). The downside to their approach is the concrete must be baked on site.

Not to say this is a bad approach, there are plenty of uses for precast concrete, but it also makes this process useless for any concrete which needs to be poured in-situ and allowed to cure (eg footpaths, building slabs, etc.).

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gobblox38 t1_jd9jgbn wrote

The plant already exists. In the article, they say that a portion of the plant is being retrofitted.

The biggest red flag for me is the claim that they'll pull co2 out of the air. That'll require a lot of energy just to pull that off. It would be better to get the co2 from a concentrated source such as a smokestack or exhaust pipe. I don't see how their proposed process will result in a net carbon sequestration unless the energy comes from nuclear power or carbonless renewable energy.

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tattooedplant t1_jd9doo2 wrote

It’s kind of depressing to read the posts there regarding medical advancements because of that. It’s like “oh this new med seems great even tho it likely won’t come out in the next 15 years!” Then, even after it does, it would be so expensive and practically out of reach for the average person until it goes generic. There are several newer meds I’d love to try, but they are just so expensive for those of us in the US even with insurance.

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