Core Viewpoint - The 2024 China Ecological Environment Status Bulletin indicates continuous improvement in ecological environment quality and stable environmental safety across the country [1] Air Quality - The average concentration of PM2.5 in cities at or above the prefecture level reached 29.3 micrograms per cubic meter, a decrease of 2.7% from 2023 - The proportion of days with good air quality was 87.2%, an increase of 1.7 percentage points from 2023 - The proportion of heavily polluted days was 0.9%, a decrease of 0.7 percentage points from 2023 - The average PM2.5 concentrations in the Beijing-Tianjin-Hebei region, Yangtze River Delta, and Fenwei Plain decreased by 0.9%, 0.9%, and 4.8% respectively compared to 2023 [2] Surface Water Quality - The proportion of surface water quality in categories I to III was 90.4%, an increase of 1.0 percentage points from 2023 - The proportion of water quality in category V or worse was 0.6%, a decrease of 0.1 percentage points from 2023 - Among 210 key lakes and reservoirs, the proportion of those with good water quality was 77.1%, an increase of 2.5 percentage points from 2023 - The water quality in major river basins such as the Yangtze and Yellow Rivers remained stable at category II for several consecutive years [3] Marine Water Quality - The proportion of coastal waters meeting Class I standards in summer was 97.7%, a decrease of 0.2 percentage points from 2023 - The overall quality of nearshore marine waters remained stable, with 83.7% classified as good (Class I and II) [4] Soil Environment - The overall heavy metal content in key soil risk monitoring points showed a declining trend, indicating initial control over soil pollution - The safety utilization rate of contaminated arable land reached 92% - The rate of rural domestic sewage treatment exceeded 45% [5] Natural Ecology - The Ecological Quality Index (EQI) value was 59.95, indicating a "Category II" ecological quality, reflecting rich biodiversity and high coverage of natural ecosystems - The forest coverage rate exceeded 25% [6] Noise Environment - The daytime and nighttime compliance rates for noise environment in cities at or above the prefecture level were 95.8% and 88.2% respectively, with a slight decrease in daytime compliance [7] Nuclear and Radiation Safety - No significant nuclear or radiation incidents occurred, with the annual occurrence rate of radiation accidents remaining below one per ten thousand sources - The overall radiation environment quality was good [8] Climate Change Response - The proportion of coal consumption in total energy consumption was 53.2%, a decrease of 1.6 percentage points from 2023 - The share of clean energy sources in total energy consumption rose to 28.6%, an increase of 2.2 percentage points from 2023 - The cumulative transaction volume of carbon emission rights reached 630 million tons, with a total transaction value of 43.033 billion yuan [9] Solid Waste and New Pollutants Management - The construction of "waste-free cities" is being advanced, with 113+8 cities and regions accelerating the implementation of related tasks - New pollutant management initiatives are being launched in key river basins, focusing on specific pollutants and industries [10]

Group 1 - The core viewpoint of the articles highlights the efforts of Jiangsu's Zhenjiang Economic Development Zone in enhancing environmental protection and waste management through innovative projects in local chemical companies [1][2][3] Group 2 - Zhenjiang Qimei Chemical has invested 15 million yuan in a wastewater treatment system upgrade project, which includes the construction of four new water pools and the transformation of three existing tanks, achieving full coverage for accident water collection [1] - The new water pool can store 1,200 cubic meters of water, and the entire system can handle a maximum accident water volume of 23,130 cubic meters, ensuring emergency response capabilities for up to 12 hours [1] - The Zhenjiang Economic Development Zone has implemented six water pollution prevention projects in 2024, achieving a 100% compliance rate for water quality at five national and provincial monitoring points [1] Group 3 - Yulide (Jiangsu) Chemical has developed a project to produce 100,000 tons of chlorinated paraffin, which utilizes by-product hydrochloric acid, reducing hazardous waste and associated disposal costs by selling it as a secondary product [2] - The project generates approximately 159,000 tons of by-product hydrochloric acid annually, which is collected and transported to enterprises for use in metal surface pickling [2] Group 4 - The initiatives in Zhenjiang Economic Development Zone reflect a commitment to high-quality waste management and environmental improvement, with 100% completion rates for key construction tasks and regulatory compliance in hazardous waste management [3] - The zone aims to enhance ecological quality and support the goals of the 14th Five-Year Plan and the beginning of the 15th Five-Year Plan through comprehensive governance and improved environmental standards [3]