here are six main classes of gaseous contaminants which are routinely described in Tautomotive exhaust (a term which will be used here to refer to both automobile and diesel exhaust). As shown in Table 1, carbon monoxide (CO) is the largest component of automobile exhaust whereas the oxides of nitrogen (NO ) constitute the main components of diesel exhaust. x Even though nitrogen oxides contrib...

the main cause for concern about global warming and climate change. Primary air pollutants include carbon monoxide (CO), carbon dioxide, water vapour and un-burnt fuel, hydrocarbons, including volatile and non-volatile organic compounds, oxides of nitrogen, sulphur dioxide (traces), and particulate matter. Pollutants, such as small particles arise not only from the exhaust but also from the roa...