4 ms·
> Traffic was about 25% of PM2.5 in 1995, combustion was like 90% of that. 1995 numbers seem like a poor choice, given engines ran vastly dirtier back then. >
by Veedrac 4y ago
> Traffic was about 25% of PM2.5 in 1995, combustion was like 90% of that.
1995 numbers seem like a poor choice, given engines ran vastly dirtier back then.
> "Every bit helps" though right? Except PM pollution is global in scope.
The latter point doesn't contradict the former point. Every little bit does help. I am certainly not claiming we should make tire emissions the primary focus of emissions reduction, just that we should care about air quality enough to also tackle tire emissions seriously.