; (D) the impact of State requirements for continuing education for such workers; (E) the impact of having State and local health departments and independent environmental health agencies track continuing education units for such workers; and (F) the frequency at which a State or local health department or other entity updates and reviews any examination required to qualify or assess environmental health workers to ensure that such examination is consistent with current law. (b) Study on appropriate level of environmental health workforce and natural disaster preparedness Not later than 2 years after the date of enactment of this Act, the Secretary of Health and Human Services shall collaborate with appropriate associations, organizations, and councils, such as the National Academy of Medicine, to conduct a study on— (1) environmental health in communities before and after natural disasters; and (2) the role of environmental health workers to help improve environmental health. 6. Definitions In this Act, the terms environmental health workers and environmental health workforce refer to public health workers who— (1) investigate and assess hazardous environmental agents in various environmental settings; and (2) develop, promote, and enforce guidelines, policies, and interventions to control such hazards.