Methane Emission

In Dhaka, 45 to 55% of the total waste (2,200 ton/day) are unmanaged waste (less than 4 m depth) and dumped in open space. These sites can be the optimal candidates for Landfill gas emission. Each day huge amount of municipal solid waste is disposed in the dumping sites, which produces significant amount of methane (CH4) for emission into the atmosphere. In 2019, methane (CH4) accounted for about 10 percent of all U.S. greenhouse gas emissions from human activities. Human activities emitting methane include leaks from natural gas systems and the raising of livestock. Methane is also emitted by natural sources such as natural wetlands. In addition, natural processes in soil and chemical reactions in the atmosphere help remove CH4 from the atmosphere. Methane’s lifetime in the atmosphere is much shorter than carbon dioxide (CO2), but CH4 is more efficient at trapping radiation than CO2. Pound for pound, the comparative impact of CH4 is 25 times greater than CO2 over a 100-year period.

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