Much of Asia is being steadily engulfed in the polluting haze caused by the growing use of two and three-wheel vehicles, such as scooters and motorcycles.
The level of the threat posed by these vehicles to human health is unique to Asia, and the solutions have to come from within. But many experts question the continent's capability to come up with substantial and effective solutions.
This articles explores the size and nature of the problem, and what needs to be done about it.
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Tackling Asia's small vehicle menace