waste gas emission standard

例句：

1. 1.The factory is required to meet the waste gas emission standard.
   该工厂需要达到废气排放标准。
2. 2.The company has implemented stricter waste gas emission standards in recent years.
   该公司近年来实施了更严格的废气排放标准。
3. 3.The new policy aims to reduce the amount of waste gas emissions from factories.
   新政策旨在减少工厂的废气排放量。