This book has presented the atmospheric concentrations of 1,3-Butadiene and BTEX (Hazardous Air Pollutants) at traffic squares, petrol pumps and residential areas. Monitoring of BBTEX become important due to their tropospheric chemistry and risk pose to human healths. The correlation and concentration ratio studies helps to know the impacts of transportation emissions on commuters, workers and residential peoples. This book has five chapters : 1) Introduction 2) Materials and Methods 3) Result and Discussions 4) Conclusions and 5) Bibliography characterized by clear, methodological,...