二是要切实落实历次峰会承诺。
Second, members should implement the commitments they made during the previous G20 summits.
三是要切实落实各级环保主管部门的责任。
The third is to effectively implement the responsibility of environmental protection authorities at all levels.
要明确责任主体，层层落实责任，把解释引导工作做到位，一旦出现违法行为要予以依法处置。
The main responsibility must be clear at various levels to implement the responsibility to explain and guide the work been done, or if the offense is to be disposed of according to law.
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