Diesel vehicles have low fuel consumption and low carbon emissions, but hot weather will release more air pollution.

Author \ A new vision of grassroots influence

Due to the high power efficiency of diesel vehicles, compared with gasoline vehicles, it helps to reduce fuel consumption and carbon emissions, so the annual sales volume has been rising since listing, especially in Europe, the world's largest diesel vehicle market.

However, the sales of electric vehicles and diesel vehicles, which may be encouraged by various countries, have fallen sharply in the past year, even in the European market. Recently, a new study has made the situation of diesel vehicles worse. Even with newer and cleaner models, the emissions of diesel vehicles will increase in hot climate, which is undoubtedly a vicious circle of global warming.

The research conducted in Paris found that when the temperature exceeds 30 degrees Celsius, the Nox emissions of diesel vehicles will increase by 20% to 30%, which is almost normal in summer.

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In fact, the road emissions of many series cars are many times higher than those announced by manufacturers in laboratory tests, which is another discovery after the 20 15 German "Diesel Gate" scandal. Among them, the emission of nitrogen oxides emitted by Flowserve cars on the road is 40 times that of laboratory tests. In addition, even motorcycles that are much smaller than four-wheeled vehicles have found that some pollutants far exceed the average values of gasoline vehicles and diesel vehicles.

This latest report, released by TRUE, used high-tech remote sensing detection equipment as a measuring tool to measure the emissions of more than 6,543,808 cars on the streets of Paris in three weeks in the summer of 2065.438+08. At present, more than 370,000 such measurements in Britain, France and other countries have been compiled into the new rating system of TRUE.

The survey was not conducted in the most downtown area of Paris, but on three roads in Paris 12 and 13. Most of the vehicles under inspection are buses and light commercial vehicles, and the samples also include buses, motorcycles, light motorcycles (usually below 50 c.c) and trucks. Like the similar research conducted in London the year before last, the purpose is to measure the actual emissions of vehicles on the road under a series of different driving and traffic conditions.

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Through these large-scale tests, it can be found that no matter what kind of car, brand and model, it emits much more nitrogen oxides than the public knows. If we can use public transportation, cars, bicycles, etc. As far as possible, I believe that as long as everyone comes together, air pollution will definitely decrease, and the number of people deeply affected by asthma and allergies will also decrease relatively. It can be said that everyone is a winner.

The new vision of grassroots influence authorizes the reprint of the original source. The hotter the weather, the more air pollution diesel cars emit.