The answer is that we need to produce almost 10B tonnes of CO2 every year. That's something on the order of 1500 great pyramids of Giza (which weighs 6M tonnes) worth of carbon every year.
Isn't carbon capture harder than emitting carbon (hand-waving at thermodynamics here)?
Also, don't all methods of carbon capture produce new emissions again because they need energy, resources etc?
I don't claim to be able to do the hard science here, but the comparison you make seems a lot more far-fetched to me than that of the original comment.
edit: sister comments already make the argument much more clear and I guess the self-doubt of people with responsible intention versus the chuzpe of climate denialists contributes even more to our dire outlook.
If you were being sarcastic: oh well, not helpful.
Quoting a sibling comment here:
> The sad reality with carbon capture is that it's an excuse to put more carbon into the atmosphere than is actually being captured. The oil and gas companies pump billions into capturing carbon are not interested in efficiencies. They are merely interested in making many billions more on dumping more carbon in the atmosphere. If that ever gets close to what they produce, their cost will be so high that they will be out of business
Isn't carbon capture harder than emitting carbon
To burn coal, we have to dig it up from the ground. Is it possible that we one day find a way to "dig it up from the air" instead which is "less hard" than to dig it up from the ground?
Or that we find some other process which has seperating carbon and oxygen as a byproduct? Like some form of photosynthesis? Trees already do this.
The fastest bird can fly 200 mph.
Apollo 10 flew at 25k mph. A factor of over 100.
Maybe we can increase trees by a factor of 100 too.
Most carbon we produce is caused by burning of energy-dense fuel, leaving well:
heat, smoke, gas dissipation and some forms of energy that are useful to us.
If I understood basic thermodynamics at school, this process is irreversible and claims to the contrary are charlatanery.
Firstly, we only need to seperate carbon and oxygen.
Secondly, we get thousands of times more energy from the sun than we need.
So even if seperating carbon and oxygen requires energy, that is not fundamentally a problem.
Clear to see how cynical it is if you keep pumping carbon out of the ground at the same time as trying to reclaim some bit of it from the atmosphere.
> Firstly, we only need to seperate carbon and oxygen.
Separating carbon and oxygen is literally reversing the process of creating energy from fuel. That's how physics works.
Please stop trying to make arguments when you don't even understand the fundamentals of the subject.
I don't agree: using a bird and an Apollo space mission in speed comparison is a completely invalid support for that proposition: the rocket which launched Apollo 10 had to burn 770 tons of kerosene and 1300 tons of liquid oxygen in 150 seconds to achieve these speeds which are possible to be kept then only once outside of atmosphere and outside of the earth "gravity well". It didn't depend on anything of unknown physics or chemistry: Tsiolkovsky published his rocket equation in 1903.
Contrary to that, your "maybe 100 times" would depend on something different from what we know the physics and chemistry say for the last hundred years.
Blind, naive techno-utopianism will doom us all.
That makes zero sense — thermodynamics prefer lower energy states. Coal burns on its own, so that’s the direction of the reaction. It doesn’t become coal on its own, so you have to put energy into that and you net lose on that.
I'm not saying we shouldn't invest money and time in carbon DAC, it will become important later after we stopped emitting tons and tons of CO2 every day.
How do trees get the energy to sequester carbon?
From the sun.
So you use solar and other renewables to power carbon sequestration.
Startups like Terraform are taking things further by converting that into fuels we already know how to use, which will displace fossil fuels: https://caseyhandmer.wordpress.com/2023/01/09/terraform-indu...
They seem to very deliberately not use the name methane in their presentation. CH4 is methane.
Surely there is a simm type game that can illustrate this super clearly?
Civilization: X - The end
game as well
It should include consumerism, garbage and car culture and insane urban planning as well. It could have a satisfying, Idle-game-like pair of bars:
- external costs
- profit
Maybe this could even be presented in a form aking to regular bookkeeping standards.
37.12 billion metric tons of CO2 currently released per year
https://www.statista.com/statistics/276629/global-co2-emissi....