Sentences with phrase «tailpipe emissions studies»
Previous studies mainly have consisted of computer simulations of atmospheric chemical reactions based on tailpipe emissions studies.
https://www.sciencedaily.com/ Not exact matches
«The study says it will be very hard to make a biofuel that has a better greenhouse gas impact than gasoline using corn residue,» which puts it in the same boat as corn - based ethanol, said David Tilman, a professor at the University of Minnesota who has done research on biofuels» emissions from the farm to the tailpipe.
The study found that the largest sources of vehicular - related methane emissions came from tailpipes (30 %) and crank cases (39 %).
The study used the utility factor (since in pure EV mode there are no tailpipe emissions) and the EPA best estimate of the CO2 tailpipe emissions produced by these vehicles in real world city and highway operation based on the EPA 5 - cycle label methodology, using a weighted 55 % city / 45 % highway driving.