07.04.2013 Views

Pambansang Summit sa W ambansang Summit sa W ... - UP Baguio

Pambansang Summit sa W ambansang Summit sa W ... - UP Baguio

Pambansang Summit sa W ambansang Summit sa W ... - UP Baguio

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

mg/m 3<br />

mg/m 3<br />

250<br />

200<br />

150<br />

100<br />

50<br />

0<br />

00:00<br />

02:00<br />

04:00<br />

06:00<br />

08:00<br />

10:00<br />

12:00<br />

14:00<br />

16:00<br />

18:00<br />

20:00<br />

22:00<br />

Source: EMB-DENR CAR 2011<br />

05:00 in the morning until 20:00 in the<br />

evening. The levels abate only when the<br />

residents are already in their homes, and<br />

may not neces<strong>sa</strong>rily be enjoying the benefits<br />

of the lower air pollution in the city<br />

center. Thus, on a daily basis, an ‘averaging<br />

out’ of the actual hourly pollution levels<br />

gives somehow a false sense of security,<br />

and masks the seriousness of the levels<br />

of exposure over the span of the day<br />

when the levels of pollution impact on<br />

them the most.<br />

How ‘acceptable’ or how ‘bad’ the air<br />

quality of <strong>Baguio</strong> really is? It now becomes<br />

obvious that the assessment depends on<br />

the standard that is being adopted as the<br />

norm. The more ‘lenient’ the standard<br />

being used, the ‘better’ the air quality appears<br />

to be. This means that there would<br />

be lesser political pressure on the local and<br />

national authorities to undertake measures<br />

to curb the current air pollution levels.<br />

When the health of the citizens is at risk<br />

through exposure to the current high concentrations<br />

of ambient air pollutants, the<br />

potential risk is not removed by adopting<br />

a more ‘permissive’ standard.<br />

An independent study on the air quality<br />

of <strong>Baguio</strong> by Cassidy, et al. (2007), using<br />

the levels of concentration of finer and<br />

even more dangerous particulates (PM 2.5 ),<br />

found a similar pattern of hourly concen-<br />

6 TI SIMILLA April 2011<br />

Philippines 24-hr<br />

Guideline<br />

67.3 <strong>Baguio</strong> 4-day<br />

mean<br />

WHO/EU 24-hr<br />

AQG<br />

Fig. 2. Hourly behavior of PM 10 levels in the <strong>Baguio</strong> Central Business<br />

District, 24-hr periods, 8-11 February 2011<br />

(In µg/m 3 )<br />

Column<br />

trations of the ambient air<br />

pollutant in the <strong>Baguio</strong><br />

CBD. The mean level over<br />

a three-week period in December<br />

2004 was determined<br />

to be at 72.9µg/m 3 .<br />

The guideline set by the<br />

WHO for PM 2.5 is 10µg/<br />

m 3 . For the US Environmental<br />

Protection Agency<br />

(EPA), standard is set at<br />

15µg/m 3 . For the EU, the<br />

standard is 25µg/m 3 . In<br />

general, the standards set<br />

for PM 2.5 are more stringent<br />

than those allowable<br />

for larger particulates. The<br />

authors used the figures they obtained to<br />

compare the <strong>Baguio</strong> PM 2.5 levels with<br />

those observed in selected cities of the<br />

world that had higher mean levels than<br />

the US EPA standard. The comparison is<br />

shown in Table 3.<br />

From their findings, the authors<br />

observed that:<br />

Excluding the studies in Beijing,<br />

China, no other study observed an average<br />

ambient PM 2.5 concentration as high<br />

as the levels present in <strong>Baguio</strong> City. …<br />

Continuous ambient concentrations of<br />

the magnitude seen in <strong>Baguio</strong> are rarely<br />

seen in developed countries and are sporadically<br />

seen within developing countries,<br />

except in areas prone to elevated concentrations<br />

partially<br />

due to local topography.<br />

The combination<br />

of pollution<br />

sources and the local<br />

topography makes<br />

<strong>Baguio</strong> City’s ambient<br />

air quality worse<br />

than that seen in<br />

most locations<br />

throughout the<br />

world.<br />

The evidence at<br />

hand on the levels of<br />

ambient air pollut-<br />

Sampling Location g/m 3<br />

Sampling Location g/m<br />

Beijing, China (1999-2000) 116.0<br />

Beijing, China (2003) 93.6<br />

<strong>Baguio</strong> City, Philippines (2004) 72.9<br />

Seoul, South Korea (2001-02) 48.5<br />

Turin, Italy (2000-01) 44.9<br />

Mexico City, Mexico (1997) 38.7<br />

Guatemala City, Guatemala (1997) 37.9<br />

Los Angeles - South Coast Basin (2002-04) 24.8<br />

Barcelona, Spain (2000-01) 22.2<br />

Paris, France (2000-01) 17.8<br />

3<br />

Beijing, China (1999-2000) 116.0<br />

Beijing, China (2003) 93.6<br />

<strong>Baguio</strong> City, Philippines (2004) 72.9<br />

Seoul, South Korea (2001-02) 48.5<br />

Turin, Italy (2000-01) 44.9<br />

Mexico City, Mexico (1997) 38.7<br />

Guatemala City, Guatemala (1997) 37.9<br />

Los Angeles - South Coast Basin (2002-04) 24.8<br />

Barcelona, Spain (2000-01) 22.2<br />

Paris, France (2000-01) 17.8<br />

Source: Cassidy, et al. 2007.<br />

ants in <strong>Baguio</strong>, set against the national and<br />

international minimum standards for a<br />

healthy air quality, point to an inescapable<br />

conclusion: the current air pollution<br />

levels in <strong>Baguio</strong>, on the basis of the mean<br />

levels of PM 10 and PM 2.5 , respectively, pose<br />

a potential risk to the health of local citizens.<br />

For this alone, there exists a societal<br />

problem at hand, and the issue merits foremost<br />

policy attention, recognition, and<br />

concerted policy design and intervention<br />

to bring down the levels of the known<br />

ambient air pollutants to the level of the<br />

national, if not international standards for<br />

public health.<br />

Will the Problem be Given Proper<br />

Recognition?<br />

What chances are there that the extent<br />

of the problem would indeed be recognized?<br />

Are there any complaints from the<br />

citizens of <strong>Baguio</strong>, and a clamor for measures<br />

to bring down current air pollution<br />

levels? A real cause for concern is that the<br />

finer ambient particulates are imperceptible<br />

to the man-on-the-street. When he/<br />

she suffers respiratory or coronary ailments<br />

from these air pollutants, the connection<br />

would not neces<strong>sa</strong>rily be established.<br />

For indeed, what proportion of the<br />

local residents would likely be informed<br />

of the nature of these ambient particulates,<br />

their levels of concentration in the air they<br />

continued on page 12<br />

Table 3. Mean PM concentrations in <strong>Baguio</strong> CBD and various cities in<br />

2.5<br />

the world.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!