Has strong enforcement of occupational and environmental health rules worked to reduce injuries and illnesses?

Has strong enforcement of occupational and environmental health rules worked to reduce injuries and illnesses?

Has strong enforcement of occupational and environmental health rules worked to reduce injuries and illnesses? In your comments address any differences between the enforcement of occupational and environmental health regulations. Support your comments with the literature. Is it beneficial to the United States to attempt to harmonize its rules for regulating chemicals with those of the rest of the world?