According to the Environmental Management Bureau (DENR), these are vehicles/ machines propelled by or through oxidation or reduction reactions including combustions of carbon-based or other fuel, constructed and operated principally for the conveyance of persons or the transportation of property or goods that emits air pollutant as a reaction product. These engines are powered either by gasoline, diesel, compressed natural gas (CNG), liquefied petroleum gas (LPG) or other alternative fuel, each contributing a set of pollutants into the air. Mobile sources may be further categorized as to type of vehicles - cars, utility vehicles (UVs), trucks, buses, motorcycle/ tricycle (MC/TC), trailer, aircraft, marine vessels, etc.
Table 1. National Annual Motor Vehicle Registration by Vehicle Type, 2007-2009
Source:
Land Transportation Office, 2010
Table
1 indicates that from 2007 to 2008, there is an increase of 6.13% of the total
vehicles in the Philippines, and an increase of 5.29% from 2008 to 2009. This
means that there is already a large increase in the emission of reaction
products into the air, therefore also increasing the pollution in the air.
Table 2. Regional Annual Motor Vehicle
Registration, 2007-2009
(Source: Land
Transportation Office, 2010)
Table 2 shows that NCR has a total of 1,592,036 vehicles which comprises 28.79%, Region III with 13.26% and Region IV-A with 13.07% of the total population of vehicles in 2007. In 2008, vehicles in NCR increased by 4.68 %, Region III by 8.79% and Region IV-A by 7.11%. In 2009, NCR had an increase of 5.54%, Region III by 4.28% and Region IV-A by 4.75%. This data shows that in NCR, there is an average increase of 5.11%, Region III by an average of 6.535% and Region IV-A by an average of 5.925%. Table 2 also shows that NCR contributes most of the pollution in the air which is brought about by the number of vehicles that run in this region.
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