Each country’s electricity grid is made up of many types of power generation such as thermal power (using coal, oil, and gas), hydroelectricity (using water power), and nuclear power (using nuclear energy). and other types of renewable energy such as wind power, solar power, and wave power... In general, all of the above types of electricity emit greenhouse gases at different levels. Internationally, to assess the cleanliness of a country’s electricity grid, the concept of the “Emissions coefficient of the national grid” is introduced (tons of CO2/MWh of electricity). And obviously, a country with a low-emission grid will be a more civilized country, at least in terms of electricity use and environmental protection. In Vietnam, the emission factor of the national power grid will be announced annually by the Climate Change Department under the Ministry of Natural Resources and Environment. The usual announcement time is in the first quarter of the following year. However, up to this point, it is January 2023 and we still do not have data for 2021 (Table 1). The delay of nearly a year has also caused some difficulties for entities and individuals when they have to calculate emissions while performing an ISO 14064 emission energy inventory or an energy audit. Therefore, in this article, we would like to “hold the light in front of the car”, as “Try to calculate the emission factor of Vietnam’s electricity grid in 2021” before being updated with official data.
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