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Solar energy is getting so inexpensive and more TWhr installations will come online in the next century, it’s still possible we can use that energy.

I’m thinking more on the 100 year timeline.

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But then you will need the space freed from agriculture for the solar energy production, instead of forests? In the end, isn't a field of corn a massive solar energy plant?

But not nearly as much land would be required, if Nebraska was covered with solar panels, that would be enough for the world:

https://www.wolframalpha.com/input/?i=200+W%2Fm%5E2+*+area+o...

A real improvement would be to reduce the amount of grain we need to produce. Cutting down on beef consumption would have a huge impact.

Yes but plants have built in solar panels, you need to have solar energy that is much more efficient than plants and also very, very cheap

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