Knowledge or topics related to water conservation

How many people in our country do not have access to safe drinking water.

1. Water, with the chemical formula H2O, is an inorganic substance composed of hydrogen and oxygen, which is non-toxic and drinkable. It is a colorless and odorless transparent liquid at room temperature and pressure, and is known as the source of human life. Water is one of the most common substances on the earth, an important resource for the survival of all life, including inorganic chemistry, and the most important component of living organisms.

2. The conductivity of pure water is very weak, and it is a very weak electrolyte. Water in daily life has more anions and cations due to the dissolution of other electrolytes, so it has more obvious conductivity.

Water includes natural water (rivers, lakes, atmospheric water, seawater, groundwater, etc.) and artificial water production (water obtained by combining hydrogen and oxygen atoms through chemical reactions). Water (chemical formula: H2O) is an inorganic substance composed of hydrogen and oxygen, which is a colorless and odorless transparent liquid at room temperature and pressure.

Water is one of the most common substances on Earth, an important resource for the survival of all life, including humans, and the most important component of living organisms. Water has played an important role in the evolution of life. Human beings have long begun to understand water, and water is regarded as a basic component in the ancient simple material concepts of the East and the West, and water is one of the five elements in ancient China. Water is also present in the ancient Western theory of the four elements.

World Water Day is another holiday established by mankind at the end of the 20th century. The United Nations has long been committed to addressing the global water crisis caused by rising demand for water. The 1977 United Nations Water Conference issued a grave warning to the world:

Water will soon become a profound social crisis, and 22 March is designated as "World Water Day" every year.

1. Water is the source of human life.

2. Water is the most abundant natural substance on the earth's surface, covering more than 71% of the earth's surface. The Earth is a veritable balloon of water.

3. People are made of water, the proportion of water in the human body accounts for about 90 when the fetus, 80 when the baby, 70 for the young and middle-aged, and only 60 50 when the elderly, and the process of aging is the process of water loss.

4. There are three states of water, namely: solid, liquid and gaseous.

However, water has more than three states: supercritical fluid, supersolid, superfluid, fermion condensate, and plasma state.

5. The simplest hydroxide with the chemical formula H2O. Colorless, tasteless, odorless liquid, at standard atmospheric pressure (101325 Pa), freezing point 0, boiling point 100, 4 at the highest density, 1 gram ml.

Ten interesting trivia facts about water, do you know?

6. Lake Baikal was known as Beihai in ancient China, and it was once the main activity area of the tribes in northern China, and legend has it that Li Bai was born in the city of Broken Leaves next to Lake Baikal.

The catchment area of Lake Baikal is 10,000 square kilometers, and the total amount of freshwater resources is trillions of cubic meters, while the total amount of freshwater resources in China is trillions of cubic meters.

7. NASA released a message confirming that multiple water sources have been found on the surface of the moon.

8. The place with the most water in the universe.

Astronomers have discovered the largest reservoir in the universe known 12 billion light-years from Earth, containing 140 trillion Earth's water volumes, an inexhaustible source!

9. If all the ice in the North and South Poles melted, and all the water on Earth was evenly distributed on the Earth's surface, then it would be 3,700 meters deep.

10. 97% of the earth's water is salty, and some of the water is still frozen under the polar ice caps, so there is less than 1% of the earth's available fresh water.