Group 1: Environmental Performance and Innovations - Hebei Wuan Steel Group has achieved ultra-low emissions across its production chain, with real-time monitoring from 1,766 environmental monitoring points [1] - The company was rated as an A-level enterprise for environmental performance by the end of 2023, indicating the highest level of environmental governance in the industry [2] - The city of Wuan has seen a transformation in its steel, coking, and cement industries, with 84% of key industry enterprises achieving A-level ratings [2] Group 2: Emission Reduction Efforts - Wuan has accelerated the elimination of inefficient production capacity, shutting down all small blast furnaces and converters [2] - The transition from long-process to low-carbon, energy-saving short-process steelmaking has resulted in a reduction of 1.6 tons of CO2 and 75% of pollutant emissions per ton of steel produced [2] - New technologies, such as carbon monoxide catalytic oxidation, have been implemented, leading to a daily reduction of approximately 51 tons of emissions [3] Group 3: Air Quality Improvements - In 2024, the average concentration of carbon monoxide in Wuan was 2.1 mg/m³, a decrease of 12.5% year-on-year [4] - PM2.5 concentration in Wuan dropped to 37.2 µg/m³ in the first half of 2025, marking a 31.27% decrease compared to the previous year [4] - The number of days with good air quality reached 133, an increase of 30 days year-on-year, achieving the best air quality levels recorded [4]

李作余：雅山以前确实是光秃秃的山，风也大，那时一刮风我们的茶几、沙发都是灰。 雅玛里克山绿化工程自1996年启动，在人、财、物都匮乏的十多年时间里，全靠人力苦干才艰难地 种下了70多万棵树。那些年，每逢周末或寒暑假，年幼的儿子李策就成了李作余的小尾巴，一起上山。 从新疆农业大学园林专业毕业后，2015年，李策进入了乌鲁木齐市沙依巴克区园林管理局园林队。 李策：跟着父亲参与种树工作。树为什么能种到石头上面，换点土就能生长，我对此产生了好奇 心，心里也埋了一颗种子。 2017年秋季，乌鲁木齐市启动"树上山"项目，雅山绿化进度按下了加速键。山上，一条条水网管线 铺开，总长度超过了3500公里；山下，日处理能力8万多吨的雅玛里克山污水处理厂高效运转，将城市 生活污水净化后，源源不断地送上山用于绿化灌溉。 央广网北京8月8日消息（记者蒋雪娇 新疆台记者董智勇 高梦辉）据中央广播电视总台中国之声 《新闻和报纸摘要》报道，雅玛里克山，曾经是新疆乌鲁木齐最大的荒山和沙尘来源。数十载接力绿 化，荒山换上绿装，成为守护城市的生态屏障。中国之声特别策划《故乡山水》本期推出《青山人未 老》。 这是乌鲁木齐一年中最热的时节，雅玛里克山 ...

Core Viewpoint - The article highlights the continuous growth and development of Nagqu, the highest prefecture-level city in China, located in Tibet, emphasizing its unique geographical and environmental characteristics [1]. Group 1: Geographic and Environmental Features - Nagqu is situated in northern Tibet and is named after the Nagqu River, a tributary of the upper Yangtze River, making it the highest prefecture-level city in China with an elevation of 4,510 meters [1]. - The region is characterized by an average elevation exceeding 4,000 meters, and it continues to rise annually due to tectonic activity [1]. - Nagqu hosts several geographical records, including the highest county in China (Shuanghu County), the largest glacier in the mid-latitudes (Puruogangri Glacier), and the highest freshwater lake in the world (Cuona Lake) [1]. Group 2: Challenges of High Altitude Living - The high altitude results in low oxygen levels, with air containing only half the oxygen of sea level, and an average annual temperature below zero degrees Celsius [1]. - The region experiences a relative humidity of around 50% and over 100 days of strong winds annually, with the boiling point of water at approximately 85 degrees Celsius [1]. - Due to the lack of oxygen, residents often experience physical challenges, such as increased heart rates and changes in lip color [2]. Group 3: Urban Development and Greening Efforts - Historically, Nagqu was the only prefecture-level city in China without trees due to its harsh environment, characterized by a thick permafrost layer that hindered tree growth [3]. - Through concerted efforts, Nagqu has successfully achieved urban greening, introducing various tree species such as highland willows, spruces, and sea buckthorns, which have enhanced the city's liveliness and visual appeal [4]. - The presence of trees has transformed the urban landscape, contributing to a more dynamic and vibrant city atmosphere, as evidenced by community activities and the gathering of wildlife [4][5].