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Actually that wouldn't be a very efficient solution because pollution is not evenly divided across the world's population. See this map [1] showing CO2 emissions per capita, or this diagram [2] showing CO2 emissions per fertility.

As this article [3] (unfortunately not in English) aptly puts it: "Air travels represents around 5% of the emissions of humanity [4], but 90% of humans have never taken a plane." (the 90% figure is arguably difficult to assess [5]. It comes from an article in French behind a paywall, but other sources [6] show similar numbers).

Finally, CO2 is of course not the only source of pollution. But this map [7] showing meat supply per person shows a similar direction.

[1] https://upload.wikimedia.org/wikipedia/commons/a/a7/CO2_emis...

[2] https://www.gapminder.org/tools/#$state$time$value=2014;&mar...

[3] https://medium.com/enquetes-ecosophiques/d%C3%A9mographie-et...

[4] https://core.ac.uk/download/pdf/30987495.pdf

[5] https://www.quora.com/What-percent-of-the-worlds-population-...

[6] https://www.theguardian.com/business/2020/nov/17/people-caus...

[7] https://upload.wikimedia.org/wikipedia/commons/e/ed/Meat_sup...