The global freshwater resources are not only scarce but also extremely unevenly distributed in different regions. According to regional distribution, Brazil, Russia, Canada, China, the United States, Indonesia, India, Colombia, and Congo account for 60% of the world's freshwater resources. About 1.5 billion people in 80 countries and regions, which account for about 40% of the world's population, have insufficient freshwater. Among them, 26 countries have an extreme water shortage of about 300 million people. Even more terrifying is that it is expected that by 2025, the world's water deficient population will double, and 40 countries and regions will face freshwater scarcity. China has a large population and is one of the most populous countries in the world. Although China is also a country with abundant water resources, its per capita freshwater resources only account for one fourth of the world's per capita freshwater resources.

The annual precipitation of water resources on continents worldwide is about 110 trillion cubic meters. After deducting the amount of water evaporated by the atmosphere and absorbed by plants, the world's river runoff is about 42.7 trillion cubic meters. Based on the world's per capita calculation, the average amount of water per person per year is 7300 cubic meters. Due to the continuous increase in world population, this average has decreased by 37% compared to 1970. In the late 1980s, the actual utilization of freshwater worldwide was approximately 300 billion cubic meters per year, accounting for 1-3% of the total available resources. However, with the growth of population and per capita income, people's consumption of water resources also increased by a total of 100 million.

With the gradual development of science and the increasing number of high-rise factories, the problem of water resource shortage is becoming more and more serious. With human destruction, the original azure "crystal ball" is no longer clear, no longer azure, and is about to dry up. There is not as much water available on Earth as humans imagine. If we compare Earth's water to a large bucket of water, then we can only use one spoonful of water, and one quarter or more of this spoonful of water has already been polluted; If they continue to be ravaged by humans, one day they will disappear into the vast universe

If there is no fresh water in the world, then the last drop must be a tear for humanity. So we need to save water and cherish water resources.