What specific global environmental threats affect public health? Give an example.?COMMUNITY HEALTH NURSING?Week 3This week we are going to talk about health care economic. Health economics, politics and law and environmental health. Health economic is a branch of economicsconcerned with issues related to efficiency, effectiveness, value and behavior in the production and consumption of health and healthcare In broad terms, healtheconomists study the functioning of health care systems and health-affecting behaviors such as smoking.Read chapter 7, 8 and 12 of the class textbook and review the attached Power Point Presentations. Once you complete the task please answer the following questions;Why is the U.S. health care market referred to as an ?imperfect? market and give and example.2. What are the financing eligibility, and covered benefits of Medicare and Medicaid?3. What is the role of the government in the health of its citizens? Give an example.4. What specific global environmental threats affect public health? Give an example.As required and stated in the syllabus present your assignment in an APA format with a minimum of 2 evidence based reference, word document attached to the forum inthe discussion tab. An arial 12 font is required, 2 replies sustained with proper references are required to any of your peers. A minimum of 600 words are required.Text Book:Community Health Nursing, Caring for the Public?s Health. (2nd ed.) Saucier Lundy, K