Public health questions

Please answer the questions as one paragraph each. No sources needed
In your opinion, what do you believe to be the top two environmental health concerns worldwide?
How the patient-provider relationship can be improved in order to increase overall quality of care and health outcomes.
Compared to other developed countries, the U.S. healthcare system is not performing highly as can be seen by life expectancy and health outcomes. What are some barriers to effective healthcare in the U.S.?
Provide an example of a public health issue (that is not discussed in the reading) that involves a systems approach intervention. (unusual topic)