POLYCYCLIC AROMATIC HYDROCARBONS (PAHs) IN AIR AND VEGETATION: CASE STUDY AT THREE SELECTED TOLL STATIONS ALONG NORTH SOUTH EXPRESSWAY IN JOHOR, MALAYSIA AZLIYANA BINTI AZHARI A thesis submitted in fulfillment of the requirement for the award of the Degree of Master of Science (Technology Management) Faculty of Technology Management, Business and Entrepreneurship Universiti Tun Hussein Onn Malaysia APRIL 2012 brought to you by CORE View metadata, citation and similar papers at core.ac.uk provided by UTHM Institutional Repository