World GDP: $105.4 trillion USD

2 points
*

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?

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4 points

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.

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2 points

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.

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3 points

CO is not a significant greenhouse gas. (And N20 is…)

Are diamond particulates likely to burn if they’re dispersed in the atmosphere?

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2 points

No reactions, just reflections. The premise is “bounce the heat before it can be trapped.”

The main reason they looked at diamond this time is because it’s very clump resistant, which is a positive for heat deflection.

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30 points
*

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.

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11 points

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

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1 point

$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

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1 point
*
Deleted by creator
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18 points

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.

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13 points

The fossil fuel oligarchy would prefer to give all mammals on Earth emphysema than stop burning fossils, and do it for 10x the price.

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5 points

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.

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54 points

Yes, let’s just have everyone on Earth breathe in diamond dust all day every day. There’s no way that could be bad for our health.

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26 points

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?

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23 points

There have never been lung issues caused by inhaling very small dust particles, right?

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10 points

just wear masks for a few decades, potentially respirators, and probably add whole house air filtration if you want to take it off at night.

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81 points

Does it have to be diamonds? Could we maybe use the ashes of billionaires instead?

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5 points
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Isn’t diamond manufactured in labs in 15 minutes now? I think the price is assuming natural diamonds value

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34 points

Human ashes are mostly carbon, so yes, of course. We’ll run out of billionaires pretty quickly, though.

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1 point

We’ll just have to try and find out.

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16 points

Let’s give it a trial run with a few thousand then we can measure the impact and reevaluate.

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40 points

Sounds like a win-win tbh

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3 points

That’s a problem that solves it self

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17 points

Nice try, DeBeers.

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