This article looks at how the European Union (EU) got started with its plan to control emissions, how it made decisions about this plan, and how it put the plan into action. It follows a structured plan that covers setting up the EU Emissions Trading System (ETS) from the beginning to the end. The researchers discuss the steps taken to launch, decide on, and implement the EU ETS within the EU. After going through these processes, the study draws conclusions based on their analysis of how the EU ETS was developed and enforced. Overall, the article is focused on the initiation, decision-making, and implementation of the EU Emissions Trading System.