The exact TRE quote here:
Difference between PM10 and
PM2.5
Fine particles i.e. PM2.5 are
lighter and stay in the air longer and travel further than
PM10. PM10 can stay in the air for
minutes or hours while PM2.5 can stay in the air for days
or weeks. PM10 can travel as
little as 1 km or as much as 50 km. PM2.5 can travel
much further – many hundreds of
kilometres. Here is the important
question. Which is more dangerous: PM2.5 or
PM10? When you inhale, you breathe
in air along with any particles that are in the air. The air
and the particles travel into
your respiratory system i.e. your lungs and airway. Along the
way, the particles can stick to
the sides of your airway or travel deeper into your
lungs. The further the particles go,
the worse the effect. Bigger particles are more
likely to stick to the sides or get wedged into one of the
narrow passages deep in the lung.
Smaller particles can pass through the smaller
airways. Because PM2.5 travels deeper
into the lungs and is made up of substances that are
more toxic e.g. heavy metals and
cancer causing organic compounds, it is far more
dangerous than PM10. PM2.5 particles
are so fine they can even enter the
bloodstream. So, because PM2.5 can
penetrate deep into the lungs and is more toxic, measuring
it is
considered a more accurate reflection of air quality than simply
measuring PM10.
The PSI readings that are
updated every hour, on the hour, on NEA’s website do not
take into account PM2.5 but
are based solely on PM10.
The hourly PSI
readings that appear in the media, such as the
screaming headline in Thursday’s (20 Jun) edition of The
Straits Times: “RECORD PSI AT 10 PM
321 Plans in place if haze worsens” are, make
no mistake, PM10
readings.
Of course I can now see why TRE kena rebutted by NEA.
This is no self-pwn at all!
Its probably not funny at all for those working at NEA who have
to deal with rubbish like TRE.
