First, there is a "command and control" approach where the Environmental Protection Agency (EPA) sets a level of pollution through a standard approach and there will be a punishment or penalty if polluters do not meet the already regulated controlled pollution level. Additionally, the EPA also sets a requirement on the technology manufacturers use for production to control pollution, called “Best Available Technology (BAT).” In this context, polluters are required by law to introduce BAT to control pollution. However, this approach could not guarantee the efficient level or cost-effectiveness of pollution control because when each company, small or large, installed BAT, it would impose a high MCC for small companies and a low MCC for small companies. large businesses. Therefore, it will create inequalities between small and large