According to recent news, China's ambient air will improve overall in 2024, with PM2.5 concentration down 2.7% year-on-year. Li Tianwei, Director of the Department of Atmospheric Environment of the Ministry of Ecology and Environment of China, said today that in 2024, the PM2.5 concentration in cities at or above the prefecture level will be 29.3 micrograms per cubic meter, down 2.7% year-on-year; the proportion of good days will be 87.2%, up 1.7 percentage points year-on-year; the proportion of days with severe or above pollution will be 0.9%, down 0.7 percentage points year-on-year. All three constraint indicators are better than the annual targets. In addition to the significant improvement, the national ambient air quality improved widely last year. The PM2.5 concentration in the Beijing-Tianjin-Hebei region decreased by 3.4% year-on-year, higher than the national average; the PM2.5 concentration in the Tianshan North Slope Urban Agglomeration, Chengdu-Chongqing Region, Fenwei Plain, the Yangtze River Middle Reaches Urban Agglomeration, and the Yangtze River Delta region decreased by 13.4%, 10.8%, 4.8%, 4.4%, and 0.9% year-on-year, respectively. Last year, the coordinated control of PM2.5 and ozone achieved initial results. Compared with 2019, the national PM2.5 concentration dropped by 19.4%, and the ozone concentration dropped by 2.7%, and remained stable at 144-145 micrograms per cubic meter for three consecutive years, and the upward trend since 2015 has been initially curbed. Prior to this, a report issued by Beijing showed that an analysis of the sources of fine particulate matter (PM2.5) showed that the major local emission pollution sources were mobile sources, accounting for 46%, among which the main "contribution" came from diesel and gasoline vehicles. Environmental experts gave an example. If a fuel car travels 11,000 kilometers a year, it will consume about 1 ton of fuel and emit about 2.5 tons of carbon dioxide. If it is replaced with a new energy vehicle, at least 1.5 tons of carbon dioxide emissions can be reduced. Compared with the emissions of pollutants such as particulate matter and nitrogen oxides, new energy vehicles have the advantage of "zero emissions". |
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