Principles for selecting control items and designing indicators under industry emission standards

In fact, the discussion focuses on the two points mentioned in the main post: 1. Selection of emission control measures based on industry standards. For different industries such as ammonia synthesis and petrochemicals, it is necessary to analyze the pollutants emitted by these industries and their respective production processes. By taking into account the current situation both internationally and domestically, appropriate and environmentally friendly control measures can be chosen for each enterprise, thereby achieving a balance between environmental protection and economic benefits. 2. Principles of indicator design: The principles, methods, and bases for establishing emission standard limits, etc. The above is my personal understanding. I am working on related research and would like to discuss it with everyone to fill in the gaps in my knowledge. Thank you! ! PS: If you have any information regarding the development and implementation of domestic and international standards, I’d appreciate it if you could share it! ! Information on this topic is also available; please give me lots of guidance!