Cherish water resources and protect the water environment.

World's Freshwater Resources

Many people imagine the Earth as a blue planet with 71% of its surface area covered in water. In fact, 97.5% of the water on Earth is salt water and only 2.5% is fresh water. Among fresh water, nearly 70% is frozen in the ice sheets of Antarctica and Greenland, and most of the rest is water in the soil or deep groundwater, which is difficult to extract for human use. Water from sources such as rivers, lakes, reservoirs and shallow groundwater is easier to extract for direct human use, but its amount is less than 1% of the world's fresh water and accounts for about 0.007% of all water on the earth. The global precipitation that falls on the continents every year is about 110 trillion cubic meters. After deducting atmospheric evaporation and water absorbed by plants, the world's river runoff is about 42.7 trillion cubic meters. Based on the world population in 1995, each person The average amount of water available per year is 7,300 cubic meters. As the world's population continues to increase, this average has dropped by 37% from 1970.

Water resource queues in various countries

Due to different geographical environments, countries and regions around the world have very different amounts of water resources. Ranked in order of water resources, the top ones are: Brazil, Russia, Canada, China, the United States, Indonesia, Bangladesh, and India. If calculated based on population average, it would be another result. China's per capita water resources are only equivalent to 1/4 of the world's per capita water resources.

Countries with serious water shortages

65% of the world’s freshwater resources are concentrated in 10 countries, but 80 countries, accounting for 40% of the population, are seriously short of water. If the annual per capita water volume of a country is less than 2,000 cubic meters, it is a water-scarce country. There are 15 countries with a per capita water volume below 1,000 cubic meters that are seriously short of water: Egypt, the United Arab Emirates, Oman, Cape Verde, Burundi, Algeria, Yemen, Jordan, Saudi Arabia, Barbados, Singapore, Bahrain, and Libya. , Kuwait, Qatar, and Malta (the annual per capita water volume is only 82 cubic meters). China is not rich in water per capita and is one of the water-scarce countries.

The future of water resources

Humanity’s demand for water is increasing day by day. The world's water consumption was 3 trillion cubic meters in 1975, 4.3 trillion cubic meters in 1994, and 7 trillion cubic meters in 2000. Some analysts predict that after 2030, the world's water resources will be in short supply; in 2050, the water deficit will be 230 billion cubic meters; in 2070, the water deficit will be 410 billion cubic meters. According to analysis by Chinese experts, China's total water demand in 2050 will be 800 billion cubic meters, an increase of 240 billion cubic meters from now. Among them, 80 billion cubic meters of urban domestic water, 300 billion cubic meters of industrial water, and 420 billion cubic meters of agricultural water.

Water is an important component of the human body, accounting for approximately 60-70% of an adult's weight. The water content in blood reaches more than 90%, so losing a lot of water can lead to death. After we eat, we need water to help us in all aspects of swallowing, digestion, transporting nutrients, and even excreting waste. Water lubricates joints, prevents eyeballs from drying out, and helps digestion with saliva and gastric juices. Water can also regulate body temperature and remove excess heat from the body through perspiration. Drinking more water can also reduce calcium levels in the urine, which can lead to stones.

Health care:

Drinking water when you are thirsty seems to be the simplest, but in fact there are some things you need to pay attention to:

Don’t drink too much when you are thirsty. . As the saying goes: "Don't eat too much if you're hungry, don't drink too much if you're too thirsty, don't eat too much, and don't drink too often." Summer is hot and sweats a lot. Many people like to drink a lot of water in one go. This is not good for the body because When the water you drink is absorbed into the blood, the amount of hemolysis will increase, which will increase the burden on the heart.

Drinking water also depends on the time.

Advisable:

Drinking a glass of water after getting up in the morning can help eliminate waste from the body and reduce blood sugar concentration.

Drinking a glass of water one hour before meals can promote the secretion of digestive juices by the digestive organs and increase appetite.

Drink an appropriate amount of water during meals to aid digestion and absorption.

Not suitable:

It is not suitable to drink a lot of water immediately after strenuous exercise, as it will dilute the blood and cause discomfort.

It is not advisable to drink a lot of water after meals to avoid diluting gastric juice and gastric acid and affecting digestive function.

Don’t drink a lot of water before going to bed to avoid frequent trips to the toilet at night.