Comment on Ask HN: Now that CO2 levels are down, can we see if CO2 causes global warming?parentComments−nkkollawOP6yIs it known how long it takes for CO2 levels to decrease?For instance, if we're supposed to reduce by 50% before 2030, after how many months or years would we notice a difference?
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Is it known how long it takes for CO2 levels to decrease?
For instance, if we're supposed to reduce by 50% before 2030, after how many months or years would we notice a difference?