Day 8 – Q 3.What are the main factors causing serious levels of air-pollution in the NCR? What are the long term measures to address this problem? Suggest. 18 Sep, 2019 Day 08, GS 3 12 Comments 03. What are the main factors causing serious levels of air-pollution in the NCR? What are the long term measures to address this problem? Suggest. Share this:TelegramWhatsAppFacebookTwitter