The Ministry of Environment (KAS) through the Department of Environment (DOE) has conducted comparative monitoring and analysis of the Air Pollutant Index (API) before and during the Movement Control Order (PKP) which came into force on 18 March 2020. DOE found that there was a  2% decrease in API for the average number of days and a 2% increase in API for the number of net days throughout Malaysia  since the PKP came into force.

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