[2] https://en.wikipedia.org/wiki/Extinction_Rebellion_Youth
[3] https://en.wikipedia.org/wiki/School_Strike_for_Climate
Her Holyness [4] https://en.wikipedia.org/wiki/Greta_Thunberg
from 1968 [5] https://en.wikipedia.org/wiki/Club_of_Rome
and 1972 from that same club [6] https://en.wikipedia.org/wiki/The_Limits_to_Growth
and countless dystopian science-fiction literature and movies from that epoch.
edit: https://files.eric.ed.gov/fulltext/ED050960.pdf#page=13
"We have all heard about a population problem in the developing nations of Asia, Africa and Latin America, where death rates have dropped rapidly and populations have exploded. Only recently have we recognized that the United States may have population problems of its own. There are differing views. Some say that it is a problem of crisis proportions — that the growth of population is responsible for pollution of our air and water, depletion of our natural resources, and a broad array of social ills."
SUBTLE
Meanwhile your "ExtinctionRebellion" phrase seems like a political touchstone that you assume other people know what you're talking about, but I have no clue what it is.