I wasn't talking about coal, but rather about what happens once we've
stopped emitting CO2, say in 2080 or 2150 or whenever. Do we then wait
passively for CO2 concentrations to fall, as the CO2 is absorbed by
natural sinks, while Antarctica melts and sea levels rise by 10m per
century, or do we do something about it, like say take CO2 out of the
air ourselves?
(ok, as a technophile myself, I might want to take the benefits of the
high CO2 and do something else about the rising sea levels, like say
space based mirrors ;-)
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