Beijing Metro Air Quality Twice as Bad as Above Ground
Your morning commute just got worse: a new study says the air quality on the Beijing Metro is so poor that long-term commuters have an increased risk of contracting heart disease or cancer.
A study released by the Rock Environment and Energy Institute on
Thursday said the average reading of PM2.5 taken inside Beijing subway
trains can double those taken above ground at the same time, reported
the South China Morning Post.
The
study found the Beijing Metro to have an average PM2.5 level of 127
micrograms per cubic meter during warm seasons, almost twice the PM2.5
level outdoors. During Beijing's smoggy heating season in the winter
months, PM2.5 levels in the Beijing Metro averaged 154 micrograms per
cubic meter, 50 percent higher than those recorded above ground at the
same time.
Researchers recommended subway passengers wear air
filter masks during their commutes to protect them while also
encouraging authorities to improve subway ventilation, reported the
SCMP.
To
conduct the study, researchers asked volunteers to take readings on
portable monitoring devices on 10 major subway lines between October and
April, usually during the crowded Friday evening rush hour.
According
to the study, Beijing commuters that ride the city's subways over a
16-year period face an increased risk of death from heart disease by
1.83 percent and lung cancer by 2.42 percent.
Peking University public health professor Pan Xiaochuan was quoted as saying the results were "trustworthy," although he noted the projected health impact was based on a Western model that may not apply to China.
READ: Beijing's Blue Skies Subvert its International Reputation as the Worst City for Air Pollution
Meanwhile,
an April report that found PM2.5 levels on Toronto's subway system to
be 10 times those recorded above ground were refuted by public
transportation officials, complaining that a comparison with Beijing
caused "unnecessary harm."
"It's
most regrettable that a comparison to the air quality on the Toronto
Transit Commission (TTC) was, in certain media articles, made to that of
Beijing, one of the planet's most polluted cities," said TTC CEO Andy Byford.
The
poor air quality of the Beijing Metro has been raised before, but with
much less accuracy. Back in 2014, reports that the air in Beijing's
subway system is 16 times worse than the air outdoors were found to be
untrue. Instead, the Beijing Youth Daily conducted
a single day of tests to find that the air quality on the city's subway
is just a mere five times worse than the air above ground.
If
you don't wear an air filter mask while riding the Beijing Metro, maybe
now is a good time to start. Because even if your fellow commuters
don't, you'll always notice that the driver at the front of the subway
always happens to be fully protected.
Images: RT.com
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