The level of Methane gas is the highest in the air of Yangon according to the base line data of Yangon City Development Committee. This methane gas come out from the garbage and decayed leaves and garbage, mentioned by the Assistant Chief Engineer of YCDC.
The Pollution Control & Cleansing Dept. of YCDC have started collecting air quality index in April 2015 and finished all the 67 places on March 2016.