1 Subjects: “...human overpopulation taboo...”

2 “... be very high in terms of overpopulation, congestion, and productivity growth. One strand...”

3 “... directions: to the changing climate, to environmental degradation, to overpopulation, to geopolitics...”

4 “... (water pollution, coastal flooding, climate change, overpopulation, urban planning, waste water, plastics...”

5 “... population The problems of overpopulation pale in comparison to the problem of aging on a massive global...”