As I've said, it's not like we're going to sit around getting dumber in the meantime. Automation will help tremendously. Tractors will be automated in the future, meaning they can work/charge 24/7. Even if they don't go electric, automating them will mean we need fewer of them to perform the same amount of work. There's that sort of resource savings that will take place in most industries.
Automation will bring along easier/quicker resource depletion though. As the cost to produce something approaches zero, the consumption increases.
We'll solve the energy problem one day, probably right about the same time we see massive increases in robotic/autonomous work. The final problem to solve will be expending energy to atomically modify material into whatever we need. I expect the first 2 to occur in my lifetime, but replicator-like manipulation of atomic structure may come after.
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