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Double trouble
Life, Yvonne Bohwongprasert, Published on 30/11/2020
» In the dry winter months, it is not just the fear of Covid-19 but also the menacing presence of particulate matter 2.5 (PM2.5) -- hazardous fine-dust particles that measure 2.5 micrometres or less in diameter and affect the human respiratory system -- that the public has to contend with.