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Yes, but its net-zero carbon, so still an improvement over using fossil fuels.
Yes, but its net-zero carbon, so still an improvement over using fossil fuels.
Net-zero CO2.
Probably other factors are small, but hard to predict (particulates, volatile chemicals, other effects of growth). Might be positive or negative.
Fair, so that implies it doesn't really help, but at least isn't actively making things worse.