this post was submitted on 04 May 2025
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Science Memes

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[–] [email protected] 9 points 21 hours ago (2 children)

If it's actually more efficient then trees, could be a good idea. Saw a 51/49 video where he explained the urban development in the US requiring only male trees be planted leads to increased pollen levels and has made the "allergy season" 30+ days longer over the past 50 years or so.

[–] [email protected] 2 points 16 hours ago

I still want the trees outdoors, but this would be cool for indoor spaces. Each mall or parking lot could have a solar panel overhead and slime-tanks to produce useful byproducts.

Maybe it could be mixed with and aquaculture like fish and sea plants to create cool scenery

[–] [email protected] 2 points 19 hours ago (1 children)

While I would hate to lose actual trees, I'm medium on the idea of this on it's own. People need lots of things and space, which causes the removal of trees. If we can replicate some of their functions, such as CO2 absorption with this tech, then that seems good. If upkeep is the same as a tree, I don't see a downside to the overall concept.

My thought would be that this shows up on top of the buildings instead of at ground level, though.... Plant real trees and put these on the roof. The real loss would be if we stop making green spaces because these things meet the need for O2. Green spaces in cities do way more than just clean the air, though, so I'm not sure we're that dystopian yet.

The photo looks like it doubles as a bench too, so maybe that helps justify its footprint. Make them a mini-light show with varied colors and it can become a functional art installation. How long until it has spikes to prevent someone from taking a nap on it, though?

[–] [email protected] 1 points 18 hours ago

Yeah completely agree, I like trees and don't want them completely gone or anything.

[–] [email protected] 21 points 1 day ago

let me introduce you to this: https://www.scientificamerican.com/article/robo-bees-could-aid-insects-with-pollination-duties/

humans are crazy. You want to know whats wrong with trees and bees? It's pretty hard to make a profit of them

[–] [email protected] 22 points 1 day ago (1 children)

Wake me up as soon as some goofy ass startup found out how to arrange the algae to display ads.

[–] [email protected] 4 points 1 day ago

Add a blockchain and you could get libertarians tripping over to invest

[–] [email protected] 10 points 23 hours ago

When I was visiting Europe, seeing all the trees so well integrated into urban areas was so nice.

Then we git our flight back to Toronto. Concrete jungle.

[–] [email protected] 4 points 19 hours ago

Back when I was a kid, trees still lived under water.

[–] [email protected] 16 points 1 day ago (1 children)

Welp, all the trees are gone but at least there are these cloudy stinking tanks of goo everywhere. Does anything not dystopian happen anymore? Like these things are a set piece from Blade Runner FFS.

[–] [email protected] 10 points 1 day ago (2 children)

It's a pretty bad example in this case because the picture is literally on a street with trees. What these are probably for is putting in places where no one's going to look at them but places where you can't put trees, like industrial estates and the rooftops of buildings. Aesthetics aren't important if no one is ever going to look at them aesthetically, and anyway they kind of look cool.

[–] [email protected] 1 points 22 hours ago (1 children)

The issue is that the roof is smaller than the bench, so it doesn't even provide shade.

[–] [email protected] 1 points 16 hours ago

Like I said though that isn't what they're for. They're not going to replace trees they're just going to augment their CO2 absorption.

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[–] [email protected] 1 points 16 hours ago (1 children)

Can we please, stop reposting this same shit pic for the last, I dunno, year?

This is the gazillionth time. I get it. Is a stupid algea tank. where a simple tree does the same for a fraction of the cost. It's of no use in the public space except as a tech demo or art object.

So. Yeah... Next?

[–] [email protected] 1 points 14 hours ago

This is only the second time I've seen it, but please... there was a time when complaining about reposts was the most often repeated thing I saw on reddit. Can we not have that bit of irony become a thing here?

[–] [email protected] 26 points 1 day ago (3 children)

The issue with trees is you need to adapt the city to them, you can't adapt them to the city. And people have proven once and again that they would invent anything to not move by an inch when our way of life is put in question.

So we push forward with absurd solutions one after the other: carbon capture, atmospheric geo-engineering, a damned nuke in antarctica, and now "liquid trees".

Because the alternative is to change our ways, and we can't face that.

[–] [email protected] 3 points 1 day ago (2 children)

That's an incredibly negative spin.

All these technologies are improvements on the natural version, not a replacement for the natural version, but an upgrade. If you want nice trees go take a walk in a city park, these aren't for looking at they have a different objective. We can have both things, one isn't trying to replace the other.

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[–] [email protected] 10 points 1 day ago

I would be fine with changing my ways if changing my anything didn’t require endless paperwork. How is it fair that some guy invents agriculture and now I have to have a credit score

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[–] [email protected] 6 points 1 day ago (1 children)

These algae also produce biogas that can be used for heating or producing electricity.

[–] [email protected] 4 points 1 day ago (1 children)

Damn if only trees created something gaseous that was useful

[–] [email protected] 4 points 1 day ago

They emit carbon dioxide, a greenhouse gas, and oxygen, which causes rust in metals and aging in humans. So it's a negative really...

[–] [email protected] 72 points 1 day ago (2 children)

ITT: People who looked at some random headline, didn't bother looking further and assumed they knew everything.

It's a stupid headline. These tanks, are to directly affect air polution/quality in urban areas. Trees are terrible at that. The microalgae is 10-50x more effective in cleaning the air.

They aren't going to rip out trees for these. It would have taken you 10 seconds to find the source of the image and the article from 3 years ago to find out, the social media post was misleading. You spent more time making incorrect and wild accusations.

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[–] [email protected] 14 points 1 day ago* (last edited 1 day ago) (1 children)

Few things about trees in cities: (1) tree roots ruin sidewalks because they upend that stuff; (2) tree roots get into and ruin infrastructure, (3) not every curb can sustain a tree, so these could fit where a tree could not; and (4) they damage stuff when they fall over in storms.

[–] [email protected] 15 points 1 day ago (3 children)

Crazy thought - instead of just putting trees near curbs, have dedicated green spaces in cities where there aren't sidewalks or other important infrastructure near the trees.

[–] [email protected] 6 points 1 day ago* (last edited 1 day ago)

I think the current plan is to simply depopulate the United States through fiscal policies and have everyone move back to Europe.

[–] [email protected] 6 points 1 day ago* (last edited 1 day ago)

Why not both green spaces (central park anyone?) and these alge pods everywhere else?

[–] [email protected] 10 points 1 day ago (2 children)

Where did you get these ideas you freak

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[–] [email protected] 56 points 1 day ago (9 children)

I discovered when I joined a volunteer litter-picking group in my town that some people really hate trees. And I must emphasise HATE. They hate the shade they cast in summer, the way the leaves block the all-important View. They hate the fallen leaves in autumn. They hate the bare branches in winter. They hate the risk of branches falling in storms. They hate the racket the birds make. I was astonished - it never occurred to me that people would feel so strongly.

Turns out I'm a bloody tree-hugging extremist.

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[–] [email protected] 3 points 1 day ago (1 children)

Keep in mind that tree roots can brake through anything

[–] [email protected] 5 points 1 day ago

Not all do. That's an oak thing really. Pines, most stone fruits, etc, take a path of least resistance, unlike oaks which are more "I am going that way, and NOTHING will stop me!"

[–] [email protected] 1 points 21 hours ago

Trees won't get some tech bros bought out by Google.

[–] [email protected] 15 points 1 day ago (2 children)

Dumb take. If someone crashes their car into one of these, it can be replaced in a few days. Trees take decades to grow in ideal conditions. Between tall buildings in a city is far from ideal conditions.

Also algae is way more efficient at converting CO2 into O2; I think it's maybe multiple times more efficient using the same amount of light.

[–] [email protected] 28 points 1 day ago (3 children)

As an emergency responder, I can say with confidence that when a car hits a tree, it's rare that the car wins. The tree usually just shrugs it off.

[–] [email protected] 1 points 3 hours ago

I've definitely seen "median trees" and "sidewalk trees" here in Atlanta get removed or replaced after a car hits them. But for sure, large trees can easily shrug off a car crash. Those are just not usually in heavily urban areas like these tanks are meant for.

Not that it is super relevant to this discussion, but last month someone with a chainsaw cut down multiple (I wanna say a dozen or so) trees along a street in Atlanta in the middle of the night. Who TF would do that?!?! Sad and pointless....

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[–] [email protected] 13 points 1 day ago* (last edited 1 day ago) (1 children)

Dumb take, by the guy who has no idea how much it costs to maintain these tanks or any understanding of the scales involved, all while wanting to live in a world of green goo in tanks instead of one with trees in their cities.

[–] [email protected] 1 points 3 hours ago

Who said I wouldn't want to live in a city with trees? I just said that in some areas, these make more sense than trees.

Jeez, get off the Internet for a while. Obviously you're looking for someone to argue with. I'm not that guy.

[–] [email protected] 12 points 1 day ago

You see, trees get in the way when we want to put down more asphalt to make more room for cars. We need more lanes for cars to park in and more parking lots for cars to park in. The goal is to turn the city into a place devoid of anything but asphalt. Then with no access to dirt to grow food or water to keep them alive, the people will be 100% dependent on their capitalist overlords. Everyone wins.

[–] [email protected] 3 points 1 day ago (1 children)

Alternative in what sense?

[–] [email protected] 13 points 1 day ago (1 children)

Pretty sure some cities have about zero areas for a tree to grow. Algae produces a much larger percentage of oxygen compared to any tree.

[–] [email protected] 6 points 1 day ago (2 children)

Pretty sure trees in cities aren't there to produce oxygen or capture carbon.

[–] [email protected] 6 points 1 day ago

Trees do actually improve air quality, by absorbing harmful gases like sulphur dioxide and nitrogen dioxide through their leaves. Additionally they can reduce particulate pollution by up to 70% - https://www.bbc.com/future/article/20200504-which-trees-reduce-air-pollution-best

[–] [email protected] 11 points 1 day ago (1 children)

Mostly they're there either for decoration or to lower street temperature. Depending on how long ago they were planted.

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[–] [email protected] 71 points 2 days ago (3 children)

This is missing out on likely the most important part of trees in urban areas. Shade. They give you a cooler place to stand or walk through.

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[–] [email protected] 14 points 1 day ago (3 children)

Trees take ages to grow, and their root systems damage buildings and pavements.

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[–] [email protected] 147 points 2 days ago* (last edited 2 days ago) (16 children)

While I don't want to spoil the joke (but I will) and I hate techno-optimist solutions that displace actual solutions for our biosphere as much as the next person: supposedly, Belgrade is such a dense concrete hell that trees aren't viable solution (at least in the short term).

There is some rumbling that liquid trees are not the solution to the real problems caused by large-scale deforestation, nor does it reduce erosion or enrich the soil. However, much of this wrath is misplaced as Liquid tree designers say that it was not made as a replacement for trees but was designed to work in areas where growing trees would be non-viable. Initiatives like Trillion Trees are laudable, but there is something to be said for the true utility of this tiny bioreactor. The fact that they can capture useful amounts of carbon dioxide from day one is another benefit for them. Such bioreactors are expected to become widespread in urban areas around the world as the planet battles rising carbon levels in the atmosphere.

Source

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