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this post was submitted on 11 Sep 2023
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Mildly Interesting
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Why not? Probably because:
Bike pollution: .
Car pollution: oooooooooo
Plane pollution: OOOOOOOOOO OOOOOOOOOO OOOOOOOOOO OOOOOOOOOO OOOOOOOOOO OOOOOOOOOO OOOOOOOOOO OOOOOOOOOO OOOOOOOOOO OOOOOOOOOO
(bike pollution is slightly more than nil just because of the CO2 we breathe out while riding)
Technically, the CO2 animals exhale is carbon neutral because it's from plants you eat (or your food eats). Unless you're eating petroleum derived products of course.
I say technically because while the plants themselves are carbon neutral, modern food production and distribution, especially meat production, still has a large carbon footprint. So your breath is only truly carbon neutral if you foraged for food in the forest on foot.
So once again: return to monkee
I didn't come here to be judged
Don't forget that many small propeller driven aircraft run on leaded gas, and it's a formulation of leaded gas that has 10x the lead that motor fuel used to.
But, didn't you hear the Midgley guy who invented TEL like 100 years ago? You can safely breathe it and even wash your hands in it! (said right after he got lead poisoning)
Then he went on to make Freon.
"Most dangerous man in history"... and knowing humanity's track record, that's something.
Well sure I bet you can wash your hands in it. It's a bad idea, but you could do it.
That was a great watch - it's cool to find out the history.
I must say, society is much better off without widespread use of TEL, but as someone who used to do racecar things, TEL works like magic. A little goes a LONG way, and Midgely did legitimately stumble upon something with very high effect for the concentration (they also touch on ethanol in the video which has the drawback of needing a lot).
I'm not opposed to using it in a small scale racing context (like definitely not NASCAR) because it's so fucking useful and the quantity is unlikely to cause harm. Unfortunately so much bad has been done with it at this point, I don't think that's a very popular opinion.
Whatever your views on it, it's the only thing that can make gasoline legitimately 120+ octane, and that has huge implications for some types of racing.
Worth noting that the amount of aviation fuel burned annually should make it a negligible contributer to environmental lead contamination compared to widespread automotive use (although I'm sure it contributes on airport grounds).
Edit: All the pilots I know want to use unleaded, and it was recently approved after being stuck in a bureaucratic nightmare process, but market forces may make it hard to adopt.
Breathing isn't pollution
Depends who
oof
But some people are a waste of oxygen
They don't cycle
Walking pollution: ...
That's right, bike pollution is less than walking (or running) pollution in terms of CO2 per mile travelled. Cycling typically burns ~⅓ of the calories compared to making the same journey on foot and there's a direct link between calories burnt and CO2 produced.
Cycling at 12mph takes roughly the same energy as walking at 4mph. You emit the same CO2 per minute, but get there in ⅓ of the time. Running at 12mph takes 3 times the effort of cycling at 12mph. You'll get there in the same amount of time, but breath out 3 times as much CO2. Bicycles are more efficient than our own two legs - how cool is that!
I gave up flying to have kids. Probably worse for pollution
I gave up kids to have flying!
You environmental warrior!
More of an environmental Skyhawk, actually
To over-explain the joke to non-flying folk:
What I trained on (you get to the Warrior name eventually)
— https://en.wikipedia.org/wiki/Piper_PA-28_Cherokee
Vs @rexxit
— https://en.wikipedia.org/wiki/Cessna_172
Although I ended up a Tiger Dad
— https://en.wikipedia.org/wiki/Grumman_American_AA-5
But, do that people have light aircrafts or motherfucking Boeings 787?
Planes still require leaded gasoline and they are the largest contributor or airborne lead pollution in the US, probably the world.
No, they don't. It's like saying all cars require leaded gasoline. They can work on it, but it's banned in all countries.
Piston driven planes still do use leaded gasoline. There is a very recent push to certify lead free avgas and progress is being made but they're being a bit opaque and seemingly rushing it which is making a lot of people weary of it.
Planes that would land here typically use 100LL which contains lead. (LL stands for Low Lead). It's not banned for aviation use.
There has been a push recently to use alternatives which don't contain lead but most places still have 100LL as it's a very long process to get things certified for aviation use.
All the local small airports in the USA sell 100LL -- "One hundred, low lead".
Modern small plane engines can run off regular unleaded, but a lot of small planes in the air are "old" and require leaded gas.
I feel like it should be .. for the amount of gas I release while cycling.
😂
I've got to ask, though—how is breathing CO2 pollution? Aren't we just taking in air, removing the oxygen, and exhaling the waste gases? Isn't there the same net CO2 afterwards?
Have I misunderstood something as simple as breathing? Please say no.
You haven't misunderstood it! You're just coupling cellular respiration with photosynthesis, which on the surface seems to balance to net zero -- 6 CO2 molecules and sunlight create 1 glucose molecule, and we break down 1 glucose molecule for energy and generate 6 CO2 molecules.
There's one big factor though which isn't immediately obvious, and that's the rate of reaction. The chemical equations say nothing about how many molecules are consumed per second. In order for the net CO2 to be zero, they'd need to consume and generate CO2, respectively, at the same rate, which isn't the case.
It's actually a really good thing, because photosynthesis happens faster. Plants are net negative CO2 because of that. What we'd need to complete this comparison now is how much CO2 a human generates by existing, and we can determine how many plants are needed per human to have the same net CO2.
Thank you! What a great explanation. I'm always amazed by how much cooler things are than I expect.
Please accept this lemmygold: 🥇
Glad I could help!
Correct, 100%. I was just going through the science. Targeting human respiration as a carbon source is an extremely absurd notion.
Try reading that comment with a TTS engine. Lol
here
oof. Apologies!
This made me giggle
Cycling has carbon emissions if you factor the additional calorie intake needed to power your bike. :| Which will vary widely depending on your size, diet, and food source. Is it still a more sustainable form of transportation? Probably, but maybe not in extreme cases (like a 300-lb person eating beef daily flown in from the other side of the planet, versus, a tiny two seater electric car power off of solar energy, using batteries sourced from recycled materials) and it certainly isn't 0 impact.
Also, for extra pedantism, carbon emission are not pollution (in the sense that it doesn't poison the life forms directly), but it is a GHG which causes harm to the environment too.
If you factor calorie intake of the bike rider you need to do the same for other forms of transportation. And if you account for the amount of exercise people are supposed to get to stay healthy there's no additional calorie intake whatsoever.
Speak for yourself, I bike with a bag on my head to capture my emissions.