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China's smog problem explained

China's smog problem explained

20 Sept 00:02 Key points summarised by AI
  • Beijing and northern China are currently experiencing severe smog, with PM 2.5 levels over 20 times higher than WHO guidelines, impacting millions and causing low visibility.
  • While China declared a 'war on pollution' a decade ago, leading to significant improvements, air quality frequently remains below WHO standards, and severe pollution events are common.
  • The smog is caused by a combination of geographical factors, heavy industry, coal burning, vehicle emissions, and unfavorable weather conditions like high humidity and unseasonably hot temperatures.
  • Authorities have issued high-level pollution alerts, mandating emission cuts for businesses and transport, with further curbs possible, and advising residents to reduce outdoor activities.
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