Comment Human overpopulation. (Score 0) 145
Having 1 child averages 58.6 tonnes of CO2e per parent per year, 23.7 in poor countries, and 117.7 in rich countries like the USA (2050 vs life expectancy).
58.6 > 2.1.
We need to have a fertility rate of about 0.01 per person for several decades, or we'll turn the Anthropocene extinction into a mass extinction.