4 ms·
Seems like both of them might be worth fixing and at least part of the solution is the same.
by jfoster 10y ago
Seems like both of them might be worth fixing and at least part of the solution is the same.
- mikeash 10y agoDefinitely, and I certainly wouldn't argue against taking action against CO2 emissions because local air pollution is a bigger problem. Fight both, and where possible find solutions that help both. The tradeoffs tend to be in smaller fixes anyway. With diesel engines, there's a point where you may have to choose between more CO2 and fewer particulates, or more particulates and less CO2. But obviously both will be improved greatly if you replace that with an electric motor and batteries charged by CO2-neutral energy.
- hx87 10y agoThe trade-off in diesel engines is between more CO2 and more nitrogen oxides. Burning lean mixtures with lots of excess oxygen tends to reduce both particulates (since they are more completely burned) and CO2 (since combustion is more efficient) at a cost of nitrogen-oxygen side reactions.