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This is about NOx, which is not healthy for humans. In regards to CO2, which is bad for the climate, Diesels are indeed better than petrol cars.


NOx is also the biggest product of animal agriculture. It also has an effect on climate change. Global warming potential is around 300 times larger than CO2. [1]

[1]: https://en.wikipedia.org/wiki/Global_warming_potential#Value...


Not a chemist, but pretty sure Nitrous oxide (N2O) isn't in the NOx family.


True.




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