|
THE use
of the mandated 1-percent coco-biodiesel blend (B1) has
significantly cut down carbon emissions in Metro Manila,
according to data from the Department of Environment and
Natural Resources (DENR).
“There
has been a drastic 24.2-percent reduction in amount of
total suspended particulates [TSP] and particulate
matter [PM] in the air in the third quarter of the
year,” said Raffy Diaz Jr., managing director of the
Asian Institute of Petroleum Studies Inc. (AIPSI).
The
AIPSI official said the institute has sought to
establish a factual but informal assessment of the
environmental impact of the biodiesel mandate using the
monthly ambient air-quality monitoring data of the DENR-Environment
Management Bureau (EMB) derived from its 13 monitoring
stations in the National Capital Region.
Diaz
said the air-quality data measures TSP and PM10
(particulate matter with size of 10 micron) level in
ambient air, and that the DENR-EMB takes the lowest and
highest reading in a given month to get an average
reading.
AIPSI
used as baseline the air-quality data in the first
quarter when there was no 1-percent biodiesel mandated.
When the
Biofuels Act of 2006 took effect on May 6, AIPSI already
recorded a TSP of 17.4 percent for the second quarter.
Diaz
said that since hot air goes up and cool air comes down,
air pollutants are closer to nose level during cool wet
season (third quarter), adding that data should continue
to improve toward the drier months.
He said
this data supports positive anecdotal proof on the
effect of the biodiesel mandate as Metro Manila
residents can now see the coastline of Manila Bay in the
morning without a haze, while those in Antipolo can now
see the city without a blanket of smog.
“The
ambient air quality of the DENR, although informally
obtained, is factual enough that could be a good
indication that the biofuels mandate had, indeed, done
well in cleaning the air we breathe,” Diaz said. |