Dear MEL School’s
Topic Readers,
Top 20 most
polluted cities in the world
Which sounds more
describing the condition, most polluted air or worst air quality?
Surprisingly to
those who don’t often travel to major cities around the Indian Ocean, they seem
to be more polluted than other polluted places like Beijing or Jakarta where roads
are congested with cars and motorcycles and coals are burned to generate power
and cook meals.
The most popular
air quality indicator to human health these days is the amount of particles
smaller than 2.5 micrometers, PM2.5. These harmful particles are produced when
fossil fuels are burned. They are small enough to penetrate into the
bloodstream, and then could cause dangerous diseases such as emphysema and cancer.
These top 20
cities reported to have much more such particles in the air than what the WHO
suggests as safe to breathe and live with.
Many who live in
such polluted and expensive cities may live there for other priorities like
money, opportunity and education. One must live first before thinking about the
risk of his or her health. However, when their health is threatened, what will
become their first priority?
Enjoy reading and
thinking about where in the world you may want to live in.
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