Traditional Culture Encyclopedia - Almanac inquiry - 2019 March 22nd is the 27th World Water Day, with about 750 million people in the world. If everyone saves a drop of water,
2019 March 22nd is the 27th World Water Day, with about 750 million people in the world. If everyone saves a drop of water,
A drop of water is about 50 mg, that is, 0.00 1 g. If a person saves a drop of water, he can save 7500 kilograms of water. The capacity of this water is huge, so it is necessary to save water. After all, the water resources on the earth are not inexhaustible.
Water (chemical formula h? O), an inorganic substance composed of hydrogen and oxygen, is nontoxic and drinkable. It is a colorless and odorless transparent liquid at normal temperature and pressure, which is called the source of human life and an important substance to maintain life.
Water is one of the most common substances on earth. 0% of the earth's surface is covered with water. It is an important resource for all life, including inorganic compounds and human beings, and it is also the most important component of organisms.
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