)
Vietnamese capital Hanoi tops list of most polluted cities
Vietnam’s capital Hanoi has topped the list of world's most polluted metropolitan areas. The swiss air quality monitoring firm IQ-Air published the rankings.
Vietnam’s capital Hanoi has topped the list of world's most polluted metropolitan areas. The swiss air quality monitoring firm IQ-Air published the rankings.
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)