{"id":60059135,"date":"2024-11-07T15:50:45","date_gmt":"2024-11-07T15:50:45","guid":{"rendered":"https:\/\/dialogue.earth\/?post_type=news_digest&p=60059135"},"modified":"2024-11-07T18:23:19","modified_gmt":"2024-11-07T18:23:19","slug":"air-pollution-lingers-in-northern-china-2","status":"publish","type":"news_digest","link":"https:\/\/dialogue.earth\/en\/digest\/air-pollution-lingers-in-northern-china-2\/","title":{"rendered":"Air pollution lingers in northern China"},"content":{"rendered":"\n

The Beijing-Tianjin-Hebei region and surrounding cities have been experiencing persistent air pollution since 23 October, according to The Paper<\/a>.<\/p>\n\n\n\n

Wang Wei, a senior engineer at China\u2019s National Environmental Monitoring Centre, said that this pollution episode began 1-2 weeks earlier than usual. By 30 October, the \u201c2+36\u201d cities<\/a> \u2013 Beijing, Tianjin, and 36 surrounding cities for which air pollution control is prioritised \u2013 had cumulatively experienced 31 days of moderate to heavy pollution.<\/p>\n\n\n\n

Before this pollution had fully cleared, the region experienced another episode<\/a> of moderate to heavy pollution, from 31 October to 2 November.<\/p>\n\n\n\n

Wang Shuxiao, a professor at Tsinghua University\u2019s School of Environment, told the media that low wind speeds and high humidity in the region have created conditions that make it difficult to clear smog.<\/p>\n\n\n\n

In the last episode of pollution, PM2.5 particles were found to contain high levels<\/a> of nitrates and other secondary ions, that are produced via atmospheric reactions<\/a> of gases such as nitrogen oxides (NOx), reaching 38% and over 50% respectively. This indicates that NOx, which are emitted from industrial activities and diesel vehicles, rapidly converted under static, high-humidity conditions, and were a significant contributor to the pollution.<\/p>\n\n\n\n

To mitigate the pollution, local governments enacted strict emissions controls<\/a> on key industries and diesel trucks. By 3 November, air quality in Beijing and surrounding areas had improved significantly<\/a>, although the central and southern regions continued to experience moderate pollution which is expected to persist until mid-November, according to China Environment News.<\/p>\n\n\n\n

Since China implemented its \u201cAir pollution prevention and control action plan\u201d in 2013, air quality has improved considerably<\/a>. However, Qiu Chengcheng, an analyst at the Centre for Research on Energy and Clean Air (CREA), pointed out<\/a> that after falling for a decade, China\u2019s PM2.5 levels rebounded in 2023 due to increased human activity and unfavourable weather conditions.<\/p>\n\n\n\n

Qiu also noted that the national standard for PM2.5 concentration, at 35 \u00b5g\/m3, is still more relaxed than the World Health Organization\u2019s recommended level of 5 \u00b5g\/m3. While she welcomed the government\u2019s plans to set Beijing\u2019s target at 32\u00b5g\/m3 by 2025, Qiu highlighted that \u201cthe central government will need strict enforcement to improve air quality and to adjust to a sustainable and high-quality development model\u201d to achieve this.<\/p>\n\n\n\n

Read Dialogue Earth\u2019s earlier <\/em>report<\/em><\/a> on how climate change complicates China\u2019s \u2018battle for blue skies\u2019<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

The Beijing-Tianjin-Hebei region and surrounding cities have been experiencing persistent air pollution since 23 October, according to The Paper. Wang Wei, a senior engineer at China\u2019s National Environmental Monitoring Centre, said that this pollution episode began 1-2 weeks earlier than usual. By 30 October, the \u201c2+36\u201d cities \u2013 Beijing, Tianjin, and 36 surrounding cities for […]<\/p>\n","protected":false},"featured_media":60006649,"template":"","categories":[760],"tags":[14274,513,580],"country":[],"digest-collection":[50039911],"class_list":["post-60059135","news_digest","type-news_digest","status-publish","has-post-thumbnail","hentry","category-pollution","tag-air-pollution","tag-carbon-emissions","tag-policy"],"acf":[],"yoast_head":"\nAir pollution lingers in northern China | Dialogue Earth<\/title>\n<meta name=\"description\" content=\"The Beijing-Tianjin-Hebei region and surrounding cities have been experiencing persistent air pollution since 23 October\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/dialogue.earth\/en\/digest\/air-pollution-lingers-in-northern-china-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta 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