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This is annoying marketing bs that the motor press has been touting for decades with every new generation of efficient engines. An ICE (that's not running on H2) always generates CO2.

If it did the reverse, it would be a Fischer-Tropsch reactor. /s

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At operating temperatures, a modern ICE w/ a 3-way catalytic converter driving at highway speeds through the right environment (L.A. on a bad smog day) could easily have NOx and VOC levels at the tailpipe that are lower than what's going into the intake manifold.

this is literally how Ford marketed their PZEV (practically zero emissions vehicle) cars around 2003. https://www.latimes.com/archives/la-xpm-2004-jun-09-hy-neil9...

That's true, and has been for quite some time. Still: NOx and VOC, but not CO2.

I believe there are quite a few Volvos that, when used in dense urban environments, emit cleaner air from the exhaust than they ingest.

https://www.volvocarsmississauga.com/en/news/view/how-does-t...

I'm sure they love people believing that, but it's a cabin air purification system, and it's about PM 2.5 particles, not CO2.

There was a dutch EV prototype a few years ago that did include an active CO2 capture system as a proof of concept.

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