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> Do you now how many battery stations we need to plaster on earth?

Global power consumption is at ~23TWh. To make it through the night on nothing but solar, you'd need about 1/3th of that dedicated to batteries (Likely a lot less though due to wind, hydro, and nuclear production) So ~8 TWh of storage on the extreme end. Roughly 8000x our current battery deployments.

A lot, but not really crazy.

> how many not yet invented technologies we need to get to significant renewable

0. There are no technologies needed for significant renewable deployment. About the only thing needed is manufacturing capacity. Solar efficiency is crazy high as is wind which has driven cost/watt way down. Battery prices have similarly fallen off a cliff (and are still falling), which makes that extremely feasible at this point.

New tech will make the whole transition cheaper, but certainly isn't needed to get things switched over.

> which we could get for free if we could turn half of our coal plants off?

Ok.. but that solves only the power generation problem and runs smack dab into the politics problem. Wanting to turn off coal doesn't make it happen.

> 'unrealistic' to advocate that people replace beef with chicken and air travel with a train?

Yes, because you are talking about winning over a huge diverse group of people. Going to mars requires one rich asshole to invest in mars travel. He doesn't have to convince millions to change their habits or minds.

Realism is realizing that you can't control others thoughts or behaviors. An excellent example of this is what's happening with COVID.

You want to tell me it's realistic to convince people to give up their favorite foods when getting people to just wear masks is seen as a breach of liberty or whatever garbage?

Come on. The amount of rational people is FAR too low to realistically expect that sort of pleading to work.



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