7 million people die from air pollution every year -WHO
7 million people die from air
pollution every year -WHO
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 new report from the World Health
Organization published Tuesday.
The agency said air pollution is the
cause of about one in eight deaths and has now become the single biggest
environmental health risk.
"We all have to breathe, which
makes pollution very hard to avoid," said Frank Kelly, director of the
environmental research group at King's College London, who was not part of the
WHO report.
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
percent were in developing countries.
But WHO noted that many people are
exposed to both indoor and outdoor air pollution. Due to this overlap,
mortality attributed to the two sources cannot simply 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 and based mostly on modeling. 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 cook stoves," Flavia
Bustreo, WHO Assistant Director-General for family, women and children's health,
said in a statement.
Other 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," said Majid Ezzati, chair
in global environmental health at Imperial College London.
Kelly said it was mostly up to
governments to curb pollution levels, through measures like legislation, moving
power stations away from big cities and providing cheap alternatives to indoor
wood and coal stoves.
He said people could also reduce
their individual exposure to choking fumes by avoiding traveling at rush hour
or by taking smaller roads. Despite the increasing use of face masks in heavily
polluted cities such as Beijing and Tokyo, Kelly said there was little evidence
that they work.
"The real problem is that
wearing masks sends out the message we can live with polluted air," he
said. "We need to change our way of life entirely to reduce
pollution."
AP
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