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Air pollution kills seven million people a year – WHO

منظمة الصحة العالمية : تلوث الهواء يقتل 7 ملايين شخص سنويًا


Geneva: Air pollution is now one of the biggest environmental threats to human health, causing seven million premature deaths a year, according to the World Health Organization.

The WHO said urgent action was needed to reduce exposure to air pollution, ranking its burden of disease on a par with smoking and unhealthy eating.

The health body has significantly lowered recommended limits for key air pollutants in the face of growing evidence of their damage to health.

“WHO has adjusted almost all the air quality guideline levels downwards, warning that exceeding the new… levels is associated with significant risks to health,” it said.

“Adhering to them could save millions of lives.”

The guidelines aim to protect people from the adverse effects of air pollution and are used by governments as a reference for legally-binding standards.

The UN health agency last issued air quality guidelines, or AQGs, in 2005, which had a significant impact on pollution abatement policies worldwide.

However, the WHO said in the 16 years since, a much stronger body of evidence had emerged, showing how air pollution impacts on health at lower concentrations than previously understood.

“The accumulated evidence is sufficient to justify actions to reduce population exposure to key air pollutants, not only in particular countries or regions but on a global scale,” the organisation said.

The new guidelines come just in time for the COP26 global climate summit held in Glasgow from 31 October to 12 November.

The WHO said that alongside climate change, air pollution was one of the biggest environmental threats to human health.

Improving air quality would enhance climate change mitigation efforts, and vice versa, it said.

The WHO’s new guidelines recommend air quality levels for six pollutants, including ozone, nitrogen dioxide, sulphur dioxide and carbon monoxide.

The other two are PM10 and PM2.5 — particulate matter equal or smaller than 10 and 2.5 microns in diameter.

Both are capable of penetrating deep into the lungs but research shows PM2.5 can even enter the bloodstream, primarily resulting in cardiovascular and respiratory problems, but also affecting other organs, said the WHO.

In response, the PM2.5 guideline level has been halved.

In 2019, more than 90% of the world’s population lived in areas where concentrations exceeded the 2005 AQG for long-term PM2.5 exposure, with southeast Asia being the worst-affected region.

Premature deaths

“Air pollution is a threat to health in all countries, but it hits people in low- and middle-income countries the hardest,” said WHO chief Tedros Adhanom Ghebreyesus.

The WHO said that while air quality had markedly improved since the 1990s in high-income countries, the global toll in deaths and lost years of healthy life had barely declined, as air quality had generally deteriorated in most other countries, in line with their economic development.

“Every year, exposure to air pollution is estimated to cause seven million premature deaths and result in the loss of millions more healthy years of life,” the WHO said.

In children, this could include reduced lung growth and function, respiratory infections and aggravated asthma.

In adults, ischaemic heart disease, also called coronary heart disease, and stroke are the most common causes of premature death attributable to outdoor air pollution.

Evidence is also emerging of other effects such as diabetes and neurodegenerative conditions, the organisation said.


جنيف: ذكرت منظمة الصحة العالمية، أن تلوث الهواء يقتل سبعة ملايين نسمة سنويا خاصة في البلدان الفقيرة، واضعة قيودا أكثر صرامة على ملوثات الهواء الرئيسية ومن بينها الجزيئات العالقة في الهواء.

وأكد مدير عام منظمة الصحة العالمية تيدروس أدهانوم في مؤتمر صحفي افتراضي الليلة عقدته المنظمة الليلة لإطلاق دليل إرشادات جودة الهواء العالمية لمنظمة الصحة العالمية ، أن تلوث الهواء يعد تهديدا صحيا في جميع البلدان، وبشكل خاص للفئات الضعيفة في البلدان منخفضة ومتوسطة الدخل.

وأوضح أن كل شخص حول العالم يتعرض لمستويات غير صحية من تلوث الهواء، ويزيد استنشاق الهواء الملوث من خطر الإصابة بأمراض الجهاز التنفسي، مثل: الالتهاب الرئوي، والربو، ومرض الانسداد الرئوي المزمن، مثلما يزيد من خطر الإصابة بأعراض فيروس كوفيد-19 الشديدة،كما أنه سبب رئيس للأمراض غير السارية الأخرى، مثل: أمراض القلب، والسكتة الدماغية والسرطانات.

وأشار إلى أن إرشادات جودة الهواء العالمية المحدثة لمنظمة الصحة العالمية التي أطلقت الليلة، تقدم دليلا واضحا على الضرر الذي يلحقه تلوث الهواء بصحة الإنسان.

وبين أن للإرشادات الجديدة آثارا كبيرة على الصحة العامة لا سيما أنها توفر أداة عملية لتحسين جودة الهواء في جميع أنحاء العالم، وقاعدة أدلة قوية لتطوير معايير جودة الهواء الوطنية والمحلية.

وحث المدير العام للمنظمة جميع البلدان على استخدام هذه الإرشادات لإنقاذ الأرواح، ودعم المجتمعات الصحية، والمساعدة في معالجة أزمة المناخ، مشيرا إلى أن هذه الإرشادات تأتي في وقت مهم، قبل انعقاد مؤتمر تغير المناخ.

وتهدف المبادئ التوجيهية والارشادات التي وضعتها المنظمة إلى حماية الناس من الآثار الضارة لتلوث الهواء وتستخدمها الحكومات كمرجع للمعايير الملزمة قانونا.

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