Socioeconomic development and the growth of industrial prosperity have resulted in severe environmental and natural resources degradation, including interconnected effects like climate change and pollution. In battling these changes, the field of environmental law and policy has seen many changes over the decades. We have witnessed significant environmental activism as evident from policies and actions to respond to climate change impacts and to ensure environmental protection from local to global levels. In Thailand, one key instrument deployed for environmental protection and matters connected therewith is the Enhancement and Conservation of National Environmental Quality Act, B.E. 2535 (1992) (as amended) (the “Environmental Act”). The Environmental Act serves as the first well-rounded environmental legislation established in line with common international environmental principles. The Environmental Act had been amended several times over the years to address the changes in data and the complexity of environmental problems.