Dhaka, the largest city in Bangladesh is facing a terrible storm in terms of its air quality index. The city is home to 20 million people is at serious stake in terms of maintaining air quality. Every day, millions of people went out in search of work. The primary mode of transportation for most of them is the public bus. These public buses are poorly constructed and have high carbon emission rate. 

Moreover, a major portion of the city being unplanned. As a result, the percentage of greenery is not maintained. Motor vehicles running in and around city emits harmful carbon-di-oxide and carbon-mono-oxide gases. This is slowly scaling as more number of people is migrating to Dhaka.