Compulsory Part I, Chapter 4, Section 4, "The Significance of Water Resources for Human Survival and Development" The ppt scenario was introduced. Following the drought in North China in 2009 and the drought in five southwestern provinces in 2010, North China suffered another 100-year encounter A drought, a drought in some parts of Shandong, has happened for more than two hundred years. According to the Ministry of Agriculture, as of February 13, 2011, the area of ​​winter wheat affected by drought reached 105.43 million mu, of which 20.72 million mu was severely affected by drought. In some areas of Hebei, a well that can irrigate wheat fields requires a depth of about 500 meters, and deeper wells have appeared. The shortage of water resources severely restricts the development of society.
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