What does the Southeast Asia Haze refer to?

The Southeast Asia Haze refers to a recurring phenomenon of air pollution that occurs in Southeast Asian countries, mainly Indonesia, Malaysia, Singapore, and sometimes affecting neighboring countries as well. It is caused by illegal land clearing practices, particularly the slash-and-burn technique used in agricultural activities, such as palm oil plantations and pulpwood production. The burning of forests and peatlands releases large amounts of smoke, pollutants, and particulate matter into the atmosphere, leading to reduced air quality and a haze that covers the region. This haze can last for weeks or months and has significant environmental, economic, and health impacts on the affected countries.