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Yes, "zero" may be misleading, but displacing the emissions away from human settlement is a good thing for human health. And I assume that coal is on its way out, certainly in the 2040 timescale at least?

Coal may be out in places like Canada by 2040 assuming great advances in technology, cost & major climate disruptions. However, it is very unlikely to be out for countries in Africa and Asia that are seeing tremendous increases in energy consumption that cannot be covered by other means of energy capture due to a variety of reasons.

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