IN PRINT — A Changing Climate: Is there still a case for greener trucks?
Black smoke was once the inky signature of diesel engines everywhere. Now it has all but disappeared. A 1998 Model Year truck actually belched 35 times more smog-producing NOx and 60 times more Particulate Matter than equipment built to meet 2010 emissions standards, and that's before regulators turned their attention to Greenhouse Gases.