GOP Proven Wrong: Diesel emissions cut 90% with cheap tech
adec, adec system, air, air quality regulators, bus, buses, california, california air resources board, california transit association, control, diesel, diesel emission, emission, emission control, emissions, extengine, houston, new diesel emission control technology cuts california bus emissions, nick vermet, nox, operators, particulate matter, phil roberts, phillip roberts, proven wrong, santa clara, santa clara valley transit authority, selective catalytic reduction, some extengine, technology, transit, vehicle