role of vehicles in india leading to respiratory problems
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In physics and chemistry, the law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed.
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Exposure to vehicular pollution near busy roads is responsible for 14% of chronic childhood asthma cases, according to a new research conducted in 10 European cities.
The results are comparable to the burden associated with passive smoking which, the World Health Organization estimates, causes between 4% and 18% of asthma cases in children.
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