COLOMBO (News 1st) The National Building Research Organization states that the size of particles of dust in the atmosphere in many areas including Colombo have gradually decreased up to a normal level of 50. Senior scientist at the NBRO, Sarath Premasiri says that the size of the dust particles stood at 148 as of the […]
Dust particles in Colombo back to normal despite air pollution hazard in India – NBRO
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