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Apart from the smoke from crop fires, the festival of Diwali on the 5th with
all the fireworks didn't help either.
One source of a lot of smoke pollution in India at the best of times comes
from the burning of cow dung patties. There are a lot of cows wandering
around and wood and cow dung fires are one of the most common sources
of fuel for cooking.
Where improvements have been made in the air quality in many parts
of the world have come through improvements in exhaust emissions from
motor scooters and vehicles.
When you use to wander around places like Dehli or Bangkok, you could
come back inside, roll your tongue around inside the cheeks of your
mouth and literally taste the unburnt gasoline.
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