I understand that this is not the solution, we need to phase out gas-powered engines in order to reduce carbon emissions by 50% by 2030, and I understand that the filters would have to be changed and washed/recycled/disposed of constantly and couldn’t just sit on the tailpipe clogging up, I just don’t understand why a filter would be useless, wouldn’t it help just a little? Would it just ruin the cars? What about rooftop carbon capture devices? Is there nothing we can do to reduce pollution and carbon output from our current combustion engines?
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These days, cars run clean enough that there isn’t any particulate carbon (smoke particles) coming out of the tailpipe. The carbon comes out of the tailpipe in the form of CO2, which is a gas, and can’t be caught by a mechanical filter. You could use a chemical filter, but cars put out a LOT of CO2, and you would need an absolutely huge filter, which would fill up with CO2 quickly and need to be replaced very frequently. It would also be very expensive to make these sorts of filters.
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