Electricity consumption in Ulaanbaatar city is supplied by thermal power plants (TPS) that burn coal and produce energy from it. TPS emits large amounts of harmful smoke (CO2) into the air to produce heat and electricity. 0.9 kg of CO2 is released into the air in the form of burned coal to produce 1kW hour of energy.

Plants and trees play an important role in reducing CO2 emissions. A healthy 30-year-old tree removes 12 kg of CO2 from the air and releases oxygen (O2) per year.

Since there are currently no power plants other than coal-fired power plants in Ulaanbaatar, as energy consumption increases, the amount of CO2 and harmful smoke in the air will continue to increase.