Black lungs in south Africa again

For topic there are likely to be a number of potential exposures and health outcomes. Only pick two of the main exposures and one or two health outcomes to focus on. write in detail, focus on the topic and not just general information about the topic. the references should be from reliable sources not just general webpages. every para should clearly say why where from what. full information .please follow the instructions. and follow the material also im providing.
Use this please if required: Risk Assessment Framework
Existing risk assessment frameworks generally involve 4 main steps. These are; 1) hazard identification, 2) hazard assessment/dose-response assessment, 3) exposure assessment, and 4) risk characterization. A brief overview of the steps is provided below. Risk assessment provides the objective assessment that is used for risk management. Also include risk management/perception in the assignment.
please check these sites before proceeding.
There are many publications on Health Risk Assessment, including a Western Australian Department of Health document which can be found at: http://ww2.health.wa.gov.au/~/media/Files/Corporate/general%20documents/Environmental%20health/Health%20risk%20assesment/Health-Risk-Assessment.ashx
Chapter 1 of the enHEALTH document ‘Environmental Health Risk Assessment: Guidelines for assessing human health risks from environmental hazards’ also provides a nice summary.
http://www.eh.org.au/documents/item/916
all the lines should be paraphrased no similarity please.