Comment Re:Makes sense (Score 1) 292
But, nobody wants those nasty, polluting power plants (that have enough coal fuel to last another hundred years)... they'd rather burn the still-polluting NatGas that can be used for cooking and heating (and, you can get furnaces with 95+ efficiency). If you switch all houses to only electric everything, that power has to come from something. Nuclear power is better, fusion would be the best (if there was enough funding put towards it).
We want 100% renewables, so we will buy up every square inch of land to put up solar panels and wind turbines (great idea in the frozen North US where you have to deice the things daily in winter, and Tornado alley where you get to track down the missing panels a few counties over)... we don't want/need farms anymore, because we can get our ground beef from the farming land that used to be the Amazon and import garlic from China and import everything else from where ever it is that they grow it
Not that I think this will change your mind, but a quick back-of-the-envelope calculation is interesting:
eia.gov (https://www.eia.gov/international/rankings/country/ESH?pid=44&aid=2&f=A&y=01%2F01%2F2024&u=0&v=none&pa=44) says that the US uses 95 quadrillion BTU of energy.
At ~3412 BTU/kWhr, we need 2.78 E13 kwHrs generated.
In good solar insolation areas in the US we get about 2000 hours of equivalent direct solar per year so we need 1.4 E10 kW of panels
With ~20% efficient panels, and solar insolation at 1 kW/sq meter we need 7 E10 sq meters of panels, or 7 E4 (70,000) square kilometers.
That is a lot, but the total area of the US is ~9,200,000 sq km, so we would need about 0.76% of our land area covered in solar panels, for complete energy autonomy, at least in terms of raw numbers.
Considerations:
1) there will be some transmission losses, so more panels required.
2) most use-cases will be more efficient with electricity (motors, heat pumps, etc) so that will strongly outweigh the transmission losses, so less land will be needed. Like I said, back-of-the-envelope.