I think that the sentence is saying that in the period between 2000 and present day more plastic has been produced in the period from 2000 to -inf. A similar st

I think that the sentence is saying that in the period between 2000 and present day more plastic has been produced in the period from 2000 to -inf. A similar statement can be made about most human industrial products - cement production has a curve that appears to have more area post 2000 than pre.