“车开到哪儿，就污染到哪儿”——如何管好大货车上的“环保刺客”？

Core Viewpoint - The article highlights the illegal modification of heavy-duty trucks in China, specifically the installation of a screw on the exhaust temperature sensor, which significantly increases harmful emissions by preventing the proper functioning of the urea injection system [1][3][4]. Group 1: Illegal Modifications and Their Impact - A small screw can turn a heavy-duty truck into a mobile source of pollution, with emissions potentially increasing by dozens of times [1][3]. - In a recent inspection in Zhengzhou, only one out of fifty trucks was found to have this illegal modification, indicating a decrease in such practices due to increased enforcement [1][3]. - Heavy-duty trucks account for 80% of nitrogen oxide emissions from vehicles, making them a primary target for pollution control efforts [4]. Group 2: Economic Incentives for Illegal Modifications - Truck drivers are motivated to modify their vehicles to save costs, as the annual expense for urea can reach around 10,000 yuan, while modifications can lead to savings of several thousand yuan [5][4]. - The availability of "urea-saving screws" on e-commerce platforms, often sold with installation tutorials, facilitates these illegal modifications [5][10]. Group 3: Regulatory and Enforcement Measures - The Chinese government has recognized the need for a coordinated approach to combat illegal modifications, involving multiple departments such as ecology, transportation, and market regulation [11][10]. - Recent policies emphasize the importance of regular inspections and the establishment of a blacklist for repeat offenders [11][10]. - E-commerce platforms are urged to take responsibility for monitoring and removing illegal products that facilitate these modifications [10][11].