Contents Environmental Applications of Chitosan and its Derivatives Soon Kong Yong, Manoj Shrivastava, Prashant Srivastava, Anitha Kunhikrishnan, and Nanthi Bolan Mechanisms of Hexavalent Chromium Resistance and Removal by Microorganisms Nezha Tahri Joutey, Hanane Sayel, Wifak Bahafid, Naïma El Ghachtouli Street Dust:  Implications for Stormwater and Air Quality, and Management through Street Sweeping Steven J. Calvillo, E. Spencer Williams, and Bryan W. Brooks Assessment of Ethylene Diurea-Induced Protection in Plants: Against Ozone Phytotoxicity Aditya Abha Singh, Shalini Singh, Madhoolika Agrawal and Shashi Bhushan Agrawal