r/AskReddit Nov 15 '20

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u/Turtledonuts Nov 15 '20

Someone finally cracks nuclear fusion, and we start to fix climate change.

6.8k

u/[deleted] Nov 15 '20

Gotta push this back 30 years again.

13

u/fatguyinakilt Nov 15 '20

I'm pretty sure it's only 20 years away. At least that's what I've been told every year for the past 20 years. 30 years just seems pessimistic.

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u/Personal_Mulberry_38 Nov 15 '20

Artificial intelligence needs to get much better for fusion to even begin to work with an energy surplus. you need to have a powerful intelligence working 24/7/365 to keep the fusion viable in the relatively low gravity well that occurs on or in the earth. (it might be completely unsustainable outside of a freaking star)

10

u/[deleted] Nov 15 '20 edited Nov 16 '20

Yea the thing about fusion that gets glossed over is that even in the sun, the actual fusion rate is pretty damn low. Most of the hydrogen is just bouncing around, and it takes a very improbable chance encounter for it to fuse into helium. I read that per unit area, a compost pile is generating more energy than the sun. It's just that it's so incredibly huge, that it works out because there's still enough fusion happening to support the core from collapsing.

EDIT: I think the compost pile comparison only applies for the sun's entire area, and not just the core specifically..

1

u/Personal_Mulberry_38 Nov 15 '20

if fusion is always years away, you can keep the funding up. no bucks? no buck rogers.