UTA usually prevents more pollution than it creates — but not always

Utah Transit Authority buses and trains usually prevent more pollution than they create by reducing single-rider car trips. But a new study says that is not always the case.At times and places with low ridership — such as weekends, evenings and outside the crowded urban core — the emission-cutting benefits of UTA dwindle and even disappear, according to the study by University of Utah researchers Daniel Mendoza, Martin Buchert and John Lin.Still, it says UTA eliminates about 1.5% of