PER­ILOUS PAR­TI­CLES

Bangkok Post - - FRONT PAGE -

PM2.5 are fine par­ti­cles emit­ted by cars, trucks and buses, as well as con­struc­tion equip­ment and lo­co­mo­tives. They also re­sult from the burn­ing of fu­els such as wood, heat­ing oil or coal, and from blazes such as for­est and grass fires. Fine par­ti­cles are also emit­ted from power plants. PM2.5 refers to the di­am­e­ter of dust par­ti­cles, equiv­a­lent to 1/20 of a hu­man hair, en­abling the dust to pen­e­trate deep into lung pas­sage­ways and en­ter the blood­stream, caus­ing se­ri­ous car­dio­vas­cu­lar prob­lems.

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