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सेमिनार: अंग्रेज़ी सीखने का अवसर (23 सितंबर: दोपहर 3 बजे)
7 Million Deaths Worldwide: Air Pollution Biggest Health Risk
Apr 07, 2014

Air Pollution kills about 7 million people worldwide every year, with more than half of the fatalities due to fumes from indoor stoves, according to a report from the World Health Organisation. The agency said air pollution caused about one in eight deaths and had now become the single biggest environmental health risk.

One of the main risks of pollution is that tiny particles can get deep into the lungs, causing irritation. Scientists also suspect air pollution may be to blame for inflammation in the heart, leading to chronic problems or a heart attack.

WHO estimated that there were about 4.3 million deaths in 2012 caused by indoor air pollution, mostly people cooking inside using wood and coal stoves in Asia. WHO said there were about 3.7 million deaths from outdoor air pollution in 2012, of which nearly 90% were in developing countries.

But WHO noted that many people were exposed to both indoor and outdoor air pollution. Due to this overlap, mortality attributed to the two sources cannot simply be added together; hence WHO said it lowered the total estimate from around 8 million to 7 million deaths in 2012.

The new estimates are more than double previous figures. The increase is partly due to better information about the health effects of pollution and improved detection methods. Last year, WHO's cancer agency classified air pollution as a carcinogen, linking dirty air to lung and bladder cancer.

WHO's report noted women had higher levels of exposure than men in developing countries. Poor women and children pay a heavy price from indoor air pollution since they spend more time at home breathing in smoke and soot from leaky coal and wood stoves.

Experts said more research was needed to identify the deadliest components of pollution in order to target control measures more effectively. We don't know if dust from the Sahara is as bad as diesel fuel or burning coal.

It was mostly up to governments to curb pollution levels, through legislation, measures such as moving power stations away from big cities and providing cheap alternatives to indoor wood and coal stoves.

People could also reduce their individual exposure by avoiding travelling at rush hour or by taking smaller roads. Despite the increasing use of face masks in heavily polluted cities such as Beijing and Tokyo, there was little evidence that they worked. The real problem is that wearing masks sends out the message we can live with polluted air. We need to change our way of life entirely to reduce pollution.


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