I'm worried by the diesel we have, let alone a rush to further adoption. I think medical research has a way to go before it educates us fully on what inhaling a

I'm worried by the diesel we have, let alone a rush to further adoption. I think medical research has a way to go before it educates us fully on what inhaling all that <= PM2.5 is doing to us. The stuff has been found inside our blood cells. Can't imagine anything good coming of that. I'm skeptical that any filtration system is going to solve that problem. All of the practical systems I've read about either allow a substantial amount of small particulates through, or require some kind of regular maintenance which will screw the rest of us when it's not done. If we were serious about all of this we (in the US) would convert our heavy duty truck fleet to natural gas. I read one study stating that this would reduce our oil usage by 20%, which would be a strategic accomplishment. The air quality improvement would be a welcome byproduct.