Diesels pollute more than lab tests detect

(University of Colorado at Boulder) Because of testing inefficiencies, maintenance inadequacies and other factors, cars, trucks and buses worldwide emit 4.6 million tons more harmful nitrogen oxide (NOx) than standards allow, according to a new study co-authored by University of Colorado Boulder researchers.

from EurekAlert! - Social and Behavioral Science http://ift.tt/2qJBPvv