英文版《绿色环保》 ppt课件

2.Water pollution
According to the State of the Environment Bulletin of China and the report of the Ministry of Water Resources, in 1997, the seven major water systems, lakes, reservoirs, and parts of China's groundwater were polluted to varying degrees, and the proportion of river pollution was higher than that of 1996. In the dry season, the length of polluted rivers increased by 6.3 percentage points, and the periods of high water supply increased by 5.5 percentage points. Of the more than 50,000 km of rivers assessed, 42 were polluted, of which 12.2
英文版《绿色环保》
Environmental
Protection
contents
01 air pollution 02 water pollution
03 noxious waste pollution
04
ห้องสมุดไป่ตู้
noise pollution
01 greens
environmental protection
1. Pollution status
1. Pollution status
According to the Bulletin of China's Environmental conditions, air quality in cities in China was still in a relatively heavy level of pollution in 1997, while cities in the north were heavier than those in the south (see figure 3-1). The annual average concentration of sulfur dioxide is in the range of 3 ~ 248 μ g / m ~ (-3), and the national annual average is 66 μ g / m ~ (-3). More than half of the cities in the north and the top 1/3 cities in the south have an annual average of more than 60 micrograms per meter. The annual average of north city is 72 μ g / m ~ (-3) and that of southern city is 60 μ g / m ~ (3). The pollution of sulfur dioxide in cities of southwest high sulfur coal region represented by Yibin, Guiyang and Chongqing, and the cities of Shanxi, Shandong, Hebei, Liaoning, Inner Mongolia, Henan and Shaanxi provinces with large energy consumption in the north are more serious.
2.Pollution source
Energy use. With the rapid growth of our economy and the improvement of people's living standard, the energy demand is rising. The emission of sulfur dioxide in China is increasing rapidly. This is the main cause of the longest and most harmful acid rain pollution in southwest China. Motor vehicle exhaust In recent years, the number of motor vehicles in major cities of China has increased by a large margin, and vehicle exhaust gas has become an important source of urban air pollution. In addition, automobile emissions of lead are also important pollutants in the urban atmosphere.
1.summarize
Green environmental protection is a kind of behavior that human beings take in order to protect nature. Here the meaning of the green logo is that the logo is made up of three parts, namely, the green environmental protection below, the left and right leaves and the bud in the center, symbolizing natural ecology. The color is green, symbolizing life, agriculture, environmental protection. The figure is positive circle, meaning protection.