为何进行此次调整？成都市生态环境局移动源和噪声污染防治处相关负责人告诉记者，"国Ⅱ及以下非 道路移动机械使用时间较长，技术水平落后，污染控制装置老化，单机的污染物排放量远高于目前全市 普遍使用的国Ⅲ机械和最新的国Ⅳ机械，扩大国Ⅱ及以下机械禁止使用区域范围可以进一步减少污染物 排放，推动我市空气质量改善。" 具体而言，此次调整也存在必要性。据《中国移动源环境管理年报（2024年）》，非道路移动机械（工 程机械）的氮氧化物（NOx）和颗粒物（PM）排放量占移动源总排放量的14%、23%。淘汰国Ⅱ及以 下机械后，可有效提升空气质量。再者，《空气质量持续改善行动计划》（国发〔2023〕24号）明确要 求在2025年底前基本淘汰国Ⅰ及以下机械。 在可行性方面，成都具备良好基础。现有国Ⅱ及以下标准机械数量少、使用率低，替代难度较小。多数 区（市）县此前已将全域划为高排放禁止区，重污染天气预警期间的相关实践也积累了经验，分阶段实 施方式为设备更新预留了缓冲期。政策实施后，还可通过依法处罚有效遏制高排放机械的使用，杜绝老 旧机械流入。 转自：成都日报锦观 明年起 成都全域禁止使用国Ⅰ及以下机械 本报讯 （成都日报锦观新闻记者 ...

Group 1 - The air quality in Beijing is currently at a moderate pollution level, primarily due to PM2.5, with similar pollution observed in eastern China [1] - Since December 14, air quality has deteriorated in the Beijing-Tianjin-Hebei region and surrounding areas due to reduced wind, increased humidity, and temperature inversions [1][2] - The current pollution process is attributed to unfavorable meteorological conditions combined with high emissions from various industries, leading to the accumulation and transformation of pollutants [2] Group 2 - In the Beijing-Tianjin-Hebei region, the activity level in the thermal power and heating sector has increased by approximately 20 percentage points compared to pre-heating season levels [2] - Key industries such as steel, petrochemicals, and construction are maintaining high operational levels, contributing to persistent PM2.5 pollution [2] - The proportion of nitrates in PM2.5 has exceeded 30%, indicating that emissions from key industries and diesel vehicles are significant contributors to pollution [2] Group 3 - In response to the pollution, 86 cities in the Beijing-Tianjin-Hebei, Yangtze River Delta, and central Yangtze River regions have activated early warning responses [2] - Specific measures include differentiated control strategies for industrial enterprises based on environmental performance, such as production halts and emission limits [2] - In Hubei province, nitrogen oxide emissions from industrial sources decreased by 10.1% as part of the coordinated response to pollution [3] Group 4 - Air quality in cities like Ezhou, Xiangyang, and Suizhou improved from heavy to moderate pollution levels by December 18 [3] - Public health recommendations include minimizing outdoor activities and using public transportation to reduce traffic emissions during poor air quality [3] - Air quality is expected to gradually improve in the Beijing-Tianjin-Hebei region starting December 20, with further improvements in the Yangtze River Delta and central Yangtze River regions on December 21 [3]

银川启动重污染天气黄色预警 多举措减排改善空气质量 中新网银川12月16日电 (记者 李佩珊)受不利气象条件及污染传输影响，宁夏银川城区近日被灰蒙蒙的 薄雾笼罩，空气中夹杂着轻微的尘土感。12月16日至18日，当地空气质量将处于轻度至重度污染水平。 16日18时，银川市依据应急预案，正式启动重污染天气黄色预警(Ⅲ级)响应。 预警信息显示，17日银川空气质量以中度污染为主，18日将达到中度至重度污染，首要污染物均为细颗 粒物(PM2.5)。 编辑：姜莹 广告等商务合作，请点击这里 本文为转载内容，授权事宜请联系原著作权人 中新经纬版权所有，未经书面授权，任何单位及个人不得转载、摘编或以其它方式使用。 关注中新经纬微信公众号(微信搜索"中新经纬"或"jwview")，看更多精彩财经资讯。 银川市随即出台系列强制性减排举措。炼油、化工、水泥等重点行业企业，需通过停产、降负荷等方式 实现减排10%以上，火电企业在保障民生用电前提下同步降负荷提效减排。高排放车辆被限制上路，不 合格非道路移动机械禁止使用。全市除应急抢险外，所有施工工地暂停土石方作业，渣土车全面停运， 室外喷涂作业同步叫停，城市道路清扫和洒水频次大幅增加 ...

Core Insights - Beijing's air quality has significantly improved in the first half of 2018, with PM2.5 average concentration dropping to 56 micrograms per cubic meter, a 15.2% year-on-year decrease, marking the lowest level for the same period in history [1][2][4] - The reduction in other major pollutants, including PM10, SO2, and NO2, was also notable, with respective decreases of 8.2%, 36.4%, and 12.5% [1][2] - The number of heavily polluted days in Beijing decreased to 8, down by 9 days compared to the previous year [1][2] Summary by Category Air Quality Improvement - In the Beijing-Tianjin-Hebei region, air quality has shown substantial improvement, with Tianjin's PM2.5 concentration decreasing by 21.1% and Hebei's cities also reporting significant reductions, such as Baoding's 30% drop [1][6][7] - The average number of good air quality days in the region reached 44.9%, an increase of 0.6 percentage points year-on-year [6] Regulatory Measures - Beijing's environmental authorities have intensified management efforts, including checking 1.039 million heavy diesel vehicles and imposing penalties on 152,000 of them, which is 2.6 times the total penalties from the previous year [4] - The city has also implemented stricter regulations on construction dust and has closed down 461 manufacturing enterprises, achieving over 90% of its annual target [4] Future Plans - The Beijing government plans to accelerate the implementation of a three-year action plan to combat air pollution, focusing on heavy diesel vehicle emissions, volatile organic compounds, and dust control [5] - By the end of 2018, the government aims to publish a plan for achieving air quality standards, with specific reduction targets for nitrogen oxides and volatile organic compounds by 2020 [4][5]

Core Insights - Beijing has achieved a milestone in air quality improvement since the "14th Five-Year Plan," with PM2.5 annual average concentration decreasing from 38 micrograms per cubic meter in 2020 to 30.5 micrograms per cubic meter in 2024, marking a 19.7% reduction over four years and effectively eliminating heavy pollution days [1][2] Group 1: Air Quality Improvement - The average PM2.5 concentration in Beijing from January to September this year was 24.9 micrograms per cubic meter, a 15.0% year-on-year decrease, with 226 days classified as good air quality, an increase of 18 days compared to the previous year [2] - Compared to 2013, when the PM2.5 annual average was 89.5 micrograms per cubic meter, the heavy pollution days are projected to drop from 58 days to just 2 days by 2024, a reduction of 96.6% [2] Group 2: Governance and Management Strategies - Beijing has implemented a "0.1 microgram" action plan to enhance PM2.5 governance, focusing on a detailed management system that includes "unit governance," "source greening," and "intelligent empowerment" [3] - A monitoring network covering all districts has been established since 2018, with over 1,000 air quality monitoring stations, facilitating data sharing for better air quality assessment [3] Group 3: Emission Reduction Initiatives - The city has achieved over 50% new energy vehicle adoption this year, with monthly new energy vehicle rates for machinery remaining above 90% [4] - The introduction of clean production audits and tailored governance for enterprises has led to the establishment of 832 new green enterprises in the first eight months of this year, quadrupling last year's figures [4] Group 4: Advanced Monitoring and Response - A "three-monitoring" model has been developed to support precise management and scientific decision-making, integrating data from various sources to enhance pollution detection [6][7] - The city has established a rapid response mechanism for pollution issues, achieving a closure rate of over 17,000 problem cases since implementation [7] Group 5: Future Directions - Looking ahead to the "15th Five-Year Plan," Beijing aims to enhance multi-pollutant collaborative control, focusing on synergistic effects of pollution reduction and carbon reduction, with PM2.5 governance as a primary focus [8] - The city plans to optimize mobile source structures and promote green low-carbon transitions in industrial sources, enhancing fine governance in mega-cities [8]

Core Viewpoint - The Ministry of Ecology and Environment reported a significant decrease in the average concentration of major pollutants, including PM2.5, across China in August 2023, indicating an improvement in air quality [1] Summary by Relevant Categories Air Quality Improvement - In August 2023, the average PM2.5 concentration in 339 cities was 13.9 micrograms per cubic meter, a year-on-year decrease of 16.8% [1] - The average PM10 concentration was 27 micrograms per cubic meter, down 12.9% year-on-year [1] - The average O3 concentration was 127 micrograms per cubic meter, reflecting a 10.6% year-on-year decline [1] - The average SO2 concentration was 6 micrograms per cubic meter, showing a 14.3% year-on-year decrease [1] - The average NO2 concentration was 12 micrograms per cubic meter, with a year-on-year reduction of 7.7% [1] - The proportion of days with good air quality reached 96.0%, an increase of 5.9 percentage points year-on-year [1]

Group 1 - The average proportion of days with good air quality in China's cities at or above the prefecture level reached 96.0% in August, an increase of 5.9 percentage points year-on-year [1] - The average concentration of PM2.5 in 339 cities was 13.9 micrograms per cubic meter, a decrease of 16.8% year-on-year, while PM10 concentration averaged 27 micrograms per cubic meter, down 12.9% [1] - In the Beijing-Tianjin-Hebei region and surrounding areas, the average PM2.5 concentration was 17.7 micrograms per cubic meter, a decline of 9.2% year-on-year, with an average good air quality days proportion of 89.6%, up 10.9 percentage points [1] Group 2 - The best air quality cities among 168 key cities in August included Haikou, Huangshan, Lishui, Zhuhai, Lhasa, Liu'an, Guiyang, Fuzhou, Xiamen, and Kunming [1] - The cities with the poorest air quality were Taiyuan, Yangquan, Linfen, Lanzhou, Lüliang, Jiaozuo, Tangshan, Zibo, Jinzhong, and Baotou [1] Group 3 - The Minister of Ecology and Environment emphasized the importance of identifying key points for air pollution prevention in the 2025 air pollution prevention work meeting, aiming to achieve the air quality improvement targets set for the 14th Five-Year Plan [2]

Group 1 - The average PM2.5 concentration in Hebei from January to August was 30 micrograms per cubic meter, a year-on-year decrease of 18.9% [1] - All prefecture-level cities in Hebei achieved the national air quality secondary standard for the first time, with cities like Shijiazhuang, Handan, Tangshan, Xingtai, Baoding, and Hengshui reaching this standard for the first time in history [1] - The proportion of good air quality days in Hebei reached 77.1%, an increase of 9.5 percentage points year-on-year, while the proportion of heavily polluted days was 0.7%, a decrease of 0.9 percentage points [1] Group 2 - Hebei has made significant progress in air pollution control, particularly in energy structure, with a total planned capacity for pumped storage of 29.97 million kilowatts, ranking first in the country [2] - The installed capacity for wind and solar power reached 138 million kilowatts, accounting for 72.1% of the total power installed capacity, placing Hebei among the top in the nation [2]

Group 1 - The core viewpoint is that digital technologies, especially artificial intelligence (AI), are fundamentally transforming the global approach to environmental challenges [1][2] - The United Nations Environment Programme (UNEP) emphasizes the importance of integrating digital technology and AI into clean air and climate action strategies, as demonstrated in countries like Indonesia, Malaysia, and the Philippines [1] - Beijing serves as a model for improving air quality through strong leadership, technological innovation, and long-term planning, achieving 290 days of good air quality by 2024 [1] Group 2 - UNEP is committed to exploring the opportunities presented by digital technology and AI in addressing environmental crises while also monitoring the environmental impacts of these technologies [2] - The statement highlights the necessity of international cooperation in combating air pollution, which transcends national borders [2] - The future vision includes ensuring that digital transformation aligns with environmental sustainability to create cleaner air, a more stable climate, and a more resilient world [2]

Group 1 - The recent improvement in air quality in Henan is attributed to a combination of favorable weather conditions and effective environmental policies [3][4] - As of July 2023, Henan's PM2.5 concentration was 41.2 micrograms per cubic meter, a 14.9% decrease from the same period last year, with 140.2 days classified as good air quality [3][4] - Compared to 2017, PM2.5 levels have decreased by 25.1%, with 27 more days of good air quality and 9.4 fewer days of heavy pollution [3][4] Group 2 - The province has implemented significant measures, including the elimination of nearly 2 million kilowatts of outdated coal power capacity and the promotion of over 2.1 million new energy vehicles [4] - Policies such as the Henan Air Quality Improvement Action Plan and the 2025 Blue Sky Defense Plan have been introduced to ensure sustained air quality improvements [4] - The upcoming weather forecast indicates continued good air quality, reinforcing the trend of clearer skies and better environmental conditions in Henan [4]