Air quality in Malaysia deteriorating, urgent action needed to prevent health risks.
A study looked at air quality in Malaysia over 15 years. They found that most pollutants stayed within safe levels, but PM10 exceeded guidelines. Pollutants like NO, NO2, and O3 increased over time. Haze episodes caused high PM10 levels. Pollution was worse from June to September due to monsoons. Local traffic affected air quality. A new background station may be needed soon if development continues.