Originally Posted by BillGrissom

Pick your poison. Diesel emissions are bad for people, but mainly just in congested and/or stagnant areas like the LA Basin or the central valley around Bakersfield. But, they aren't especially bad for "climate change", which is the currently recognized threat to the earth. That comes from any CO2 emissions, i.e. burning any fossil fuels. The very best way to reduce that is to burn renewable fuels, as I do by using the new Diesel HPR which comes from bio sources. It does emit CO2, but not "net CO2" since it didn't come out of the ground. That carbon originated from CO2 in the air and thus just cycled back.