[slededit]

The US emits more CO2 while Europe releases far more NOx and other more “traditional” pollutants.

The diesel emissions scandal in the US had a European counterpart that was never dealt with. 2018 models are still polluting far above the official limits which themselves are more lax than the US. [1]

[1] https://www.sciencedaily.com/releases/2018/09/180921140151.h...

[pygy_]

The effect of those "other more “traditional” pollutants" is mostly local, whereas global warming and ocean acidification are global.

[slededit]

Ocean acidification is a global problem. NOx smog may seem local but it has large scale effects.

[pygy_]

Ocean acidification is a consequence of the massive CO2 emissions. CO2 is an acid.