The source of life ---- water

Today let us understand what is water, water is everyone knows and knows some of its roles, but not everyone attaches importance to water, but does not care about wasting water to pollute water. Water is an inorganic substance composed of aerobic and hydrogen elements. It is a colorless and odorless transparent liquid at room temperature pressure. Water on the earth through evaporation into a gaseous state after rainfall into liquid, liquid water after the baptism of low temperature into solid ice, the cycle of movement on the earth to make the earth become full of life. The water content of all plant bodies on the earth is generally between 20% and 80%, and some even as high as 90%. Without water, there is no life, water is the container for many substances, minerals in the soil, oxygen, carbon dioxide, etc. must be dissolved in water before it can be absorbed by plants. The effect of water on plants is achieved by varying in three aspects: different morphology, precipitation, and duration. Different forms of water refer to solid, liquid and gaseous states. Quantity refers to the amount of precipitation. Time refers to the duration of precipitation. All human life activities are inseparable from water, more than 70% of our body is composed of water, skin breathing, kidney work, blood circulation, heart beating are inseparable from the participation of water. The strange flora and fauna on land in the sea are inseparable from water. The importance of water is self-evident, but you know that there are very few water resources that can really be used by humans. The world like Bahrain, Kuwait, Qatar, the United Arab Emirates, etc. they are the world's most water-scarce countries, only 13% of the clean water in Afghanistan can be used by people, the rest are polluted, the world is often the poorer and more backward places the more serious the water pollution, the world is developing, science and technology in progress is expected to each of us recognize the importance of water. Let's protect every drop of clean water. Let this beautiful earth continue to function healthily and continuously.