Fan Wenyi:
What is water?
What is water? Maybe you will think this is life, maybe you will think this is wealth, maybe you will think this is hope; Although everyone can drink water, how to drink water is "scientific"? Many people get sick because of drinking water, but water is harmless.
People usually drink water according to whether they are thirsty, which is unreasonable. Because thirst means that human body's water is out of balance, human cells have been dehydrated to a certain extent, and the central nervous system sends a signal to replenish water. Drinking water when you are thirsty is equivalent to cracking the soil, which is not conducive to the growth of plants.
Water is an indispensable nutrient for human beings every day. Experiments have proved that a person can live for dozens of days without eating and drinking water, but not for a few days without drinking water. It can be seen that water is very important to human health. Healthy adults need about 2500 ml of water every day, so to stay healthy, we must pay attention to intake enough water every day. At the same time, drinking water must be scientific and hygienic.
How important water is to us! If everyone pays attention to saving water, I wonder how many people will benefit from it; On the contrary, if everyone wastes water resources carelessly, many people may suffer from drinking water difficulties!
For example, some water pipes in public places leak, we can find someone to repair them, but if they are not repaired in time, it will be a waste of our drinking water. However, spilled water will never come back, which is tantamount to wasting water resources. How wrong this is!
Fan Wener:
Familiar water
Water is a familiar substance around us.
March 22nd is the 9th World Water Day, and March 22nd-28th is the 24th China Water Week.
It is said that when the earth was just formed in the universe (from soil gasification to virtual reality), volcanoes erupted everywhere, bringing the water inside the earth to the ground; The landing of extraterrestrial meteorites also brought a lot of water from other planets. After hundreds of millions of years of evolution, the earth has become a blue planet, with water covering more than 70%.
Think about how many dull but painful scenes there are in real life: water is beating here, and dripping water is hard to find in the distance; But at the faucet, the waves are rough and no one makes it close; Here is a drop of water, but there is no disdain to enter the throat; Although I feel sad before looking at the dry well, I still let the clear water flow forever.
The era of inexhaustible water has long passed, and the era of cherishing, protecting and utilizing water resources has arrived. We should develop the habit of saving water from childhood: the water for washing vegetables and rice can be used to wash dishes and mop the floor, and the oil removal effect is very good; The water after washing clothes can be used to flush the toilet; The water from fish farming can be used to water flowers. Only the earth has enough liquid water for life to multiply. If all this water is used up, what is the word "survival"?
If we act now, the last drop of water on the earth will no longer be the tears of human regret.
Fan Wensan:
the origin of life
Water is the source of life, and its importance to plants is self-evident, and it is also very important to people. People can live for a week without food, and only three days without food at most. It can be seen that water is really a veritable "source of life", and water is also one of the most necessary nutrients for human beings.
In life, we always seem to be short of water. As soon as the tap is turned on, clear tap water will flow out, and the water in the river seems endless. In fact, although there is a lot of water on the earth, the water that can be used by people, animals and plants is pitiful, accounting for only 2.5% of the water, and the other 97.5% of the water cannot be used.
According to the statistics of the Ministry of Water Resources, 400 of the 669 cities in China are short of water, and 1 10 is seriously short of water.
Of the 32 megacities with a population of over one million, 30 have been plagued by water shortage for a long time. Among the 46 key cities, 45.6% have poor water quality, and 9 of the 14 coastal open cities are seriously short of water. There are about 7 billion people in the world, and 7 billion people need to drink 654.38+005 billion liters of water every day. What a huge number. If we continue to waste these precious waters, we will waste our lives! If everyone wastes so much, no matter how much water, it will be empty sooner or later.