If those are below average in CO2 emissions you would make the numbers worse though, and that seems pretty likely to me. Need to deport only rich immigrants owning more than one car.
Counting just private jet flight about 200 Elons (5kt CO2/y). Some people are even higher, and large yachts are worse than business jets I'd assume.
But I'd say that people tend to actually overestimate the share of super-rich; ten thousand normal US citizens emit more than a single billionaire, and there's not that many billionaires.
Deported people stop producing CO₂? Never heard that before. How does it work? Do they lose the ability to light a fire or drive a car once not in the US? And, presumably, they'd have to stop eating and breathing too?
It might be a tiny bit more feasible to convince 200000 households that they don't need a second car (or switch to electric ones), but mass murder would have a comparable effect on CO2 emissions, yes.
