Today it have a lot of PM2.5 around the world Do you know it all came from human the PM2.5 it have long time ago but not bad like this because people in this generation burning trees cut down tree ,f​actorys​,cars,little bit rain
Chiangmai ,Thailand in 14 March 2020 Chiangmai is rank 1 that have worst air in the world Chiangmai people can’t see any mountain because of PM2.5 and Chiangmai in rank 1for 2days before the day that that Chiangmai have the worst air in the world still have people try to burn & cut down trees and doesn’t care anything When everybody go outside they need to wear mask N95 or normal mask but use 2 layers ,I think we should stop burning & cut down tree Thailand Laws about cut down should stronger some people thing that Thai Laws was weak so they can do whatever they want & about the old car that black smoke should fix because it make l​ur environment worst and worst & You know how to cut down trees so you need to learn how to grow the trees too , Like if you cut 1tree you should grow 2 – 5 trees if you don’t learn how to keep the environment or save it in future maybe it will don’t have any tree or green for us to see