GC constantly improves air quality control and management system to reduce air pollutions to environment as well as monitor air emission from our operation to ensure that the emission is compliance with the required standards. GC has established several emission reduction programs such as Bio-filter installation for VOCs treatment from the Ethylene Recovery Project, optimization of Vapor Recovery Unit (VRU) project, installation of bio-filter to reduce and control VOCs from wastewater treatment system instead of using activated carbon treatement system and termination of Chloro Fluoro Carbon,. etc.