I just thought it was an interesting video that challenges what I previously understood about one specific thing 😅 I’m not advocating against the environment, neither is the video, that’d be terrible for many reasons. It’s just that the video is from PBS and seems pretty evidence based in why photosynthesis is quite terrible at converting CO2 to oxygen due to the shortcomings of the enzyme Rubisco and how we could improve that. Nothing more than that. Give it a watch, it’s not some anti-environment conspiracy video
- 0 Posts
- 25 Comments
I love nature, but interestingly apparently photosynthesis doesn’t actually contribute all that much oxygen and Earth’s levels would stay stable for millions of years if all organic matter disappeared. We’d have many, many other problems, but not that one specifically:
guy@lemmy.worldto
No Stupid Questions@lemmy.world•Why doesn't phones numbers have a "DNS" server so we can just type in words like we do with the internet?
2·2 years agoIn the first place? We kinda did to begin with, you would phone the operator and say the name of who you wanted to phone.
Introducing phone numbers simplified this, given the operator would have to know or lookup their name, and allowed for the future introduction of automated systems. Such systems were analogue and DNS was far more advanced than them. I guess the telephone becomes so widely used and integrated under that system that it still uses a similar interface today, albeit with a cluster of different modernised interconnected backends
guy@lemmy.worldto
World News@lemmy.world•UK could avoid US tariffs that the ‘atrocity’ EU is facing because Starmer has been ‘nice’, Trump suggestsEnglish
6·2 years agoThe UK and US have pretty balanced trading, both reprting surpluses. Isn’t that the real reason? Tariffs would be really stupid here
guy@lemmy.worldto
News@lemmy.world•Justices take up case on right to sue over mistaken SWAT raid.
2·2 years agoDo Americans really have a right to bear arms? It’s technically legal, but if police can murder you and get away with it when they catch you with a gun, that sounds like the consequences are a possible defacto death sentence.
They only sometimes murder you for it. But there’s plenty laws where I’m from that are only sometimes enforced when the police catch you, and not by death.
guy@lemmy.worldto
Ask Lemmy@lemmy.world•You have a sudden power outage affecting your entire city/town, how prepared are you, and how long will you "survive" not having electricity?
2·2 years agoThe 19020s 😲 You from the future?
guy@lemmy.worldto
politics @lemmy.world•Democrat moves to clarify the 22nd Amendment after Trump refers to running for third term
6·2 years agoAh, but what if he simply gets rid of democratic elections, then he needn’t worry about the issue of being elected more than twice
guy@lemmy.worldto
Technology@lemmy.world•Will the .io domain cease to exist? | TutaEnglish
9·2 years ago
guy@lemmy.worldto
World News@lemmy.world•Russia submarines and naval ships cross into buffer zone off Alaska, U.S. Coast Guard saysEnglish
3·2 years agoTo avoid sea ice, they entered an area they are legally allowed to enter… okay
guy@lemmy.worldto
Lemmy Shitpost@lemmy.world•The UK section of my local supermarket is taking the piss
20·2 years agoIn British supermarkets, they often don’t even put the beans on shelves. Instead they have stacked palettes of them, because they need to restock so often it’d be inefficient to have to unpack and shelve them.
guy@lemmy.worldto
You Should Know@lemmy.world•Toilet-specific plungers get the job done faster with way less effort and mess
151·2 years agoAre you American though? Here in the UK, nobody really owns a plunger and they don’t need to, the plumbing is different, it doesn’t clog. Do need to own a toilet brush though, to wipe off the skidmarks, which is more rare in the US.
Those names were chosen because they stereotypically fit these people, like Karen does a Karen. But popular names and connotations change over time. I feel like Stacy is a name befitting of an older person now than originally intended for the memes. I wonder if we’re going to collectively keep these names locked in time, or rename them ever
No chance I’m getting a username this simple on most platforms
I’ve found it’s best use to me as a glorified auto-complete. It knows pretty well what I want to type before I get a chance to type it. Yes, I don’t trust stuff it comes up with on its own though, then I need to Google it
guy@lemmy.worldto
Asklemmy@lemmy.ml•People who can control their dreams - what is it like?
14·3 years agoThe more control I have, the more likely I am to wake up, which is pretty annoying. Although, on the flip side, waking up through choice to avoid bad dreams is how I originally developed the skill of lucid dreaming. Noticing the signs of waking up and choosing to stay asleep is kind of a weird thing to do too, but it can lead to sleep paralysis.
However in any case, the level of control I have varies. Often, I am able to fly from danger or decide something didn’t happen and try again. More rarely I know there are no consequences to any of my actions and can completely control space, time and narrative. It’s odd knowing it’s a dream, but it still feels real. Though, still with a dream brain memory and dream logic, I’m not necessarily thinking as sensibly as I would do when awake.
guy@lemmy.worldto
Technology@lemmy.world•Chrome pushes forward with plans to limit ad blockers in the futureEnglish
42·3 years agoBut they don’t plan to drop MV2 though
guy@lemmy.worldto
World News@lemmy.world•Suella Braverman says rough sleeping is ‘lifestyle choice’English
5·3 years agoAnd not all homeless people are sleeping rough, some are in temporary accommodation etc
guy@lemmy.worldto
No Stupid Questions@lemmy.world•Is there a community where I can post anything in case I don't find the appropriate community for it?
7·3 years ago!random ?
Also, can I see the screenshot?
It’s a silly nitpick anyway. The monster, Adam, calls the doctor, Victor Frankenstein, his father. Surnames are inherited, thus they are both Frankensteins.


That’s not what I meant, I meant if all organic life that produces oxygen disappeared.
Photosynthesis is generally so slow at it’s job that the current oxygen levels were only built up over hundreds of millions of years. Furthermore, Rubisco, a key enzyme in photosynthesis, surprisingly, is slow and not very good at distinguishing oxygen from carbon dioxide, because it evolved before there was much oxygen on Earth. Therefore a lot of oxygen was produced at the beginning, most of the oxygen we have today in fact, and then not very much thereafter.
Additionally, the Earth’s oxygen levels stay stable due to the release of oxygen trapped in minerals. Over those hundreds of millions of years, they absorbed it. This absorption and release has kept levels stable for well beyond our existence.
At least that’s what I got from the PBS video. If you don’t agree, go argue with them, I’m no expert. I’m just forwarding what I learned.