Air quality in Beijing

By June 5438+00, 2023, the air quality in Beijing had reached the level of moderate pollution, and even reached the level of severe pollution in some areas.

With the coming of winter, the air quality in Beijing is deteriorating gradually, which is mainly caused by factors such as coal-fired heating and automobile exhaust emissions. According to the data of the environmental protection department, as of June 5438+ 10, 2023, the concentration of PM2.5 in Beijing has exceeded the national standard and is still rising. According to the monitoring data of the environmental protection department, Beijing's air quality has been at a moderate pollution level, and some areas have even reached a serious pollution level. These data show that air pollution has become a serious problem in Beijing and needs to be paid enough attention.

According to experts' analysis, coal-fired heating is one of the main reasons for the decline of air quality in Beijing. With the coming of winter, many residents began to use coal for heating, which led to higher and higher concentrations of pollutants in the air. In addition, automobile exhaust emissions are also one of the important causes of air pollution. Automobile exhaust contains a lot of harmful substances, such as carbon dioxide and nitrogen oxides, which will have a serious impact on air quality.

The geographical environment of Beijing

The mountainous area of Beijing is 10200 square kilometers, accounting for 62% of the total area, and the plain area is 6200 square kilometers, accounting for 38% of the total area. The terrain of Beijing is high in the northwest and low in the southeast. The average altitude in Beijing is 43.5 meters. The elevation of Beijing Plain is 20 to 60 meters, and that of mountainous areas is generally 1000 to 1500 meters.

Beijing's climate is a warm temperate semi-humid semi-arid monsoon climate, with high temperature and rainy summer, cold and dry winter and short spring and autumn. The frost-free period of the whole year is 180 to 200 days, which is shorter in the western mountainous area. In 2007, the average rainfall was 483.9 mm, which is one of the most rainy areas in North China. The seasonal distribution of precipitation is very uneven. 80% of the annual precipitation is concentrated in June, July and August in summer, and there are heavy rains in July and August.

Reference to the above content: Baidu Encyclopedia-Beijing