i'm not sure what precisely you're trying to say. If P(t) is the global population at time t and P' is dP/dt, then you're saying 1. P(2020) is huge, and 2.

i'm not sure what precisely you're trying to say. If P(t) is the global population at time t and P' is dP/dt, then you're saying 1. P(2020) is huge, and 2. P'(2020) is low P' -> 0 as t increases beyond 2020 #2 is indeed true, but it means that P will be at least as huge going forward.