This publication is the proceedings of the Thematic Session, "The Role of Geoscience in Safeguarding Our Environment" held at the 53rd CCOP Annual Session on 16 – 19 October 2017, Cebu City, Philippines. This contains 27 full papers presented at the session, from Member and Cooperating Countries of CCOP. This 223 pages publication is available both electronically and in printed book. Its 11MB PDF file can be downloaded from this link, http://www.ccop.asia/download/as/53as2.pdf