this post was submitted on 03 Apr 2024
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[–] halfwaythere@lemmy.world 49 points 7 months ago (19 children)

Replacement level for whom? To sustain the current population? Population growth? Status quo? Corporations?

Not sure any of these things are needed to be sustained at the levels we are currently at.

Someone please explain the detrimental repercussions of not having an equal to or greater than replacement level.

[–] clara 34 points 7 months ago* (last edited 7 months ago) (16 children)

sure, i'll try to explain briefly

"infrastructure", i.e utilities, transport, bureacracy etc is built to support a fixed population within a city. when the population increases, you have to build more infrastructure to support this new population. this part is easy, you expand your cities at their edges, extend the utilities, and set up satellite bureacracy offices if needed

the tricky part is when you lose population. the correct move would be to demolish this infrastructure and scale back. trouble is, not only would this be wasteful, but it would also leave gaps in cities, since population decline doesn't happen uniformly from a city edge. where exactly, do you demolish the infrastructure?

it would be nice if we live in a theoretical world where, as population decreases, the cities magically shrink at their edges, and suburban residents move closer in to fill the gaps. this is not how populations deplete from an area though (example: detroit, 1950 - 2020)

you will struggle to convince a suburban homeowner at the edge, to sell up and move to one of the gaps left behind by population loss. if we stop short of rewriting laws to force this population transfer, the end result is that you are left with a "swiss cheese" city. houses and settlements will be spread so thinly that becomes impossible for city goverments to provide "infrastructure" without providing it at a loss. your local goverment will then take debt and bankrupt, the infrastructure will collapse through lack of maintenance, and then the remaining population suffers big time

i want to note that i am not using this as an argument to support population growth. i am only stating the big, big problem that needs to be tackled somehow, concerning population loss. some big-brains are going to have to work this problem through, fast!


side note: interestingly, most NA cities are spread out and sprawled so much that they are suffering unaffordable infrastructure bills already, despite not suffering the effects of population loss. goodness knows how these places will fare when population loss actually hits...

[–] Blue_Morpho@lemmy.world -3 points 7 months ago (9 children)

houses and settlements will be spread so thinly that becomes impossible for city goverments to provide "infrastructure" without providing it at a loss

That's been proven wrong by history. Population density was far lower 150 years ago and there was no problem with infrastructure despite everyone being more spread out before urbanization. Really spread out requires even less infrastructure today. Everyone in my neighborhood is on 3+ acres so water is from self maintained wells (private paid to install and replace every 20 years) and many have solar.

[–] nrezcm@lemmy.world 19 points 7 months ago (1 children)

Heh infrastructure from 150 years ago is vastly different than infrastructure today. 150 years ago you didn't have buried electricity lines, telecom lines and fiber, robust water and sewage solutions. Those things need regular service and replacement. If your population goes down that means your revenue to pay for those things go down as well.

[–] Blue_Morpho@lemmy.world 1 points 7 months ago

In the modern world the only thing that's needed for a rural home is fiber and a road. Solar provides power. Well and septic are cheaper than city water/sewer. If people have their own land, they don't have to get food shipped from hundreds of miles away. More is grown locally.

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