PLEASE NUMBER EACH QUESTIONS1) Discuss what is meant by the term risk assessment and describe the steps that constitute risk assessment. In your answer, please also discuss human exposure assessment and how it is similar and different from risk assessment. You must provide examples to support your answer related to the principles of environmental toxicology.Your response should be at least 210 words in length.2) Discuss the precautionary principle and describe the types of environmental situations/hazards where this may apply. Please also discuss how the practice of risk assessment hinders and/or influences the precautionary principle. Make sure to support your answer with examples.Your response should be at least 210 words in length.3) Discuss the role environmental health research has in the policy cycle and how it contributes to the overall implementation of environmental health policies. Please make sure to support your answer with at least three specific examples of environmental health laws and discuss how they are enforced at the international, national, state, and local levels.Your response should be at least 210 words in length.4) Discuss what determines the toxicity of a chemical. Please provide specific discussion around the extent that you agree and/or disagree with the assumption that “every substance can be toxic.” You must provide specific examples to support your answer related to the principles of environmental toxicology.Your response should be at least 210 words in length.Course Textbook:Friis, R. H. (2012). Essentials of environmental health (2nd ed.). Burlington, MA: Jones & Bartlett Learning.
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