The geoengineering scheme, known as stratospheric aerosol injection, would not be cheap, but scientists say it could buy us some time until we reach net-zero carbon.
Amazing. Instead of just.. fighting climate change by not polluting the planet let's just fill our entire atmosphere with diamond dust, because that's the logical decision of course.
It's not really any different than usual dust, other than it is even more likely to scratch your phone (oh no!). The surprising thing is the bullshit price number, I'm sure it's some brain-dead economist looking at the point-price for diamond and with great effort making a single multiplication.
Edit: The study does note industrial diamond manufacturing, but doesn't go into detail on why it's so expensive for diamond powder, other than saying "it would require much more industrial diamond than is currently produced".... Which is just.... Empty? Considering industry would change to account for such a drastic rise in demand.
There's never been a case of something having different behavior or health effects just because of a tiny chemical difference (trans fat) or size difference (micro plastics), what's the worst that could happen?
No chance at all of a basically indestructible material not being destructed if absorbed by lungs (or gills) and leading to some disease. You don't need to check. There's no way this could go wrong.
Or, rather... I believe lead is cheaper... Given how much people like to use it, maybe it's a better option.
You are missing the point, because we need to do that anyway.
The idea is to prevent things from getting worse in the meantime.
Replacing fossil fuels take time no matter how much we invest.
ok but you just know corporations are going to use this as an excuse to keep using fossil fuels. like to them this is basically carte blanche to keep the status quo and block green energy from happening even harder. "oh hurdur har har we found a solution to climate change and it's dumping diamonds in the atmosphere, no need to pay for green energy anymore haha" type shit
That amount sounds like total bullshit. Diamonds can be manufactured and once that is done at scale, it won't be all that expensive. Even at $10000 a ton, five million tonnes would cost just 50 billion.
These are not good ideas. Remember that global warming is just an overarching effect of pollution which we will still have. What diamond dust pollution effects will be, no one knows, but I doubt we want to find out.
That number is for doing it anually for 65 years. It lists roughly 18 billion per year for the cost.
But besides that, I think you are greatly underestimating the cost of the diamonds. Synthetic ones are way cheaper than natural ones, yes, but there's a lot of room between "natural diamond expensive" and "actually cheap". Going by these prices https://www.diamondtech.com/products/categories/diamond_powder_price_list.html
It's $2.5 million per tonne. I assume you could get a cheaper price per weight if you're buying five million tonnes of anything, but it's still two orders of magnitude more expensive than you are guessing
$10000/ton is $5/lb from a quick google search they are about $250/lb for industrial diamonds. So 50* 50 or 2500 billion or 2.5 trillion with no idea if they can use run of the mill industrial diamonds or if there will be additional processing to get them into the aerosolized form also how are you going to launch them, and for how many years would we need to do it
Firstly, it’s 5 million tonnes per year. For 65 years. Secondly, the cost is for a 65 year SAI program, including developing the tech and running the missions. Thirdly, this is all explained in TFA or the links therein.
I don't get it, why wouldn't sapphire dust work? Isn't that dirt cheap to make? And it's carbon free!
Seems illogical to add carbon in the form of diamond, to a problem that is mostly caused by carbon?
The carbon isn't the problem, it's the CO2 molecule. I would be really curious if solid carbon in diamond form is able to react with ozone in the atmosphere to make CO2, or if it would be inert, or if it would do something else.
It's also Methane and CO, gasses that also contain carbon. I know diamond is pretty stable, but it does burn, and then it creates the gasses we try to avoid.