Capstone project starting points

I want to start to work on Outdoor (urban) air quality monitoring systems based on the Internet of Things 
capstone project in the Middle Eastern and African countries. Please find the attached sample of Indoor air quality monitoring systems based on the Internet of Things.
The professor wants me to revise the sample that I attached and see if this is a fit I need to work on. I revised that, and it is a good sample that can use but on outdoor air quality, not indoor. The professor wanted me to ask questions like in the attached sample. I tried to ask eight research questions that I see are important. Please make your efforts to find the answers from 50-70 publications or 70 papers.
RQ1: What are the best low cost-energy efficient systems that can be used to monitor outdoor air pollution in Middle Eastern and African countries, and why?
RQ2: What are the best types of sensors from accuracy, cost, and technology used for outdoor Air Quality Monitoring?
RQ3: What challenges can you face when using the chosen outdoor air quality
monitoring systems?
RQ4: What are the consequences of using the chosen outdoor air quality monitoring systems?
RQ5: What changes can result when using these chosen monitoring systems, including the effect on 
health and wellbeing?
RQ6: What are the best communication technologies that can be used in Outdoor Air quality monitoring
 systems?
RQ7: What are the parameters these systems can measure based on IOT?
RQ8: Can these systems develop to collect data using big sensor data analytics? Can the Middle Eastern
 and African countries imply the outdoor air quality system implied in developed countries like the U.S.A, 
Japan, and European countries?  There is a link as an example about the data analytics.
https://link.springer.com/chapter/10.1007/978-3-030-36778-7_29
These are just points to start work on the capstone project. We will have more to work on in the near
 future including tabel of content, list of tables and figures, Abstract, Intro, research methodology, literture review, discussion, 
results, conclusion, references