PUBLISHED ONJune 22, 2013 12:00 AMByGrace Chua
Some members of the public have posted their own readings attained after they conducted their own informal measurements using such meters, which recorded readings higher than the official PM2.5 count.
Some members of the public have posted their own readings attained after they conducted their own informal measurements using such meters, which recorded readings higher than the official PM2.5 count.