Simple Water Mist Scrubber for Congested Freeways?

as a congealedliquified, back down to, bring, bring these moistenedcooled, congested, congested freeways, exhaust, exhaust gases, exhaust gases and, freeways?, gases, ground, ground level, ground level as, level, level as a, moistenedcooled, particulates, particulates back down, polluted  freeways, simple water mist scrubber, solution, these moistenedcooled exhaust