But it didn't last long. In this world, there is a strange animal, that is, human. They became the overlord of the world, they were at large all over the world, and they began to pollute water resources.
One beautiful morning, when the animals jumped, sang and flew happily, a loud noise startled all the animals. They looked up to the shore and saw people. People bulldozed all the trees on the shore and began to build houses. After a few months, they built a factory, which was even worse. People in the factory discharge the wastewater from the factory into the water day and night, making it into water.
After the year of Nuogan, you can imagine what the scene here is like. Great changes have taken place here. Because the factories there constantly discharge waste water into the reservoir, and the management department there does not pay attention to the importance of protecting water resources, the water there is secretly polluted by the factories. Walking in, there is a choking smell that makes you cough, not to mention the fish here. They die tragically one after another, their bellies sticking to the water, floating and watching, you will feel sick. But don't you think the humans here are more disgusting? They made the beautiful scenery here disappear.
All the consequences of this story are caused by human beings themselves. Indeed, they really don't want to protect water resources, because they do it for their own benefit.
There is only 0. 16% fresh water resources in the world, but many fresh water resources are difficult to drink, and many of the remaining fresh water resources are polluted. I want to tell people: human beings, water is the source of life and water is the foundation of life. Without water, there is no life. Humans, don't pollute water resources for their own benefit, but protect water resources! Humans!
Interviewee: fo4r long- assistant level 3-29 09:28
Cherish resources and save water, starting from you and me (speech draft)
Qiu Wenbin of Nada Central School
Hello, teachers, classmates, uncles and aunts. My name is Qiu Wenbin, and I come from Central School. Today, the topic of my speech is "Cherish resources and save water, starting with you and me". 》
Our earth is a blue water polo, covered with water; But most of them are salt water, which can't be drunk directly, and there is not much fresh water that can really be used. For example, in the big water tank of the earth, there is only one spoonful of water available. At present, the population of more than half of the countries in the world is about 654.38+0.5 billion, of which 450 million people in 29 countries are in a state of water shortage. The word "water is as expensive as oil" is a metaphor, but it has become an irrefutable reality in many parts of the world.
As early as 1977, the United Nations held a conference on water resources, which issued a solemn warning to the whole world: water will soon become a profound social crisis, and the next crisis after the oil crisis will be water. The era of regarding water as inexhaustible has passed, and the era of regarding water as a valuable resource has arrived. China ranks only 84th in the world in per capita possession, and is one of 13 water-poor countries in the world. 300 cities in China are short of water, nearly 50 cities are seriously short of water, and 14 coastal cities are short of water. China is also facing a serious water crisis, and many places are short of water. Please listen to these figures: 1988 In summer, Wuhan residents forcibly opened 50 fire hydrants to get water. 1989, Xi' an, once known as the "Eight Rivers in Chang 'an", had a water-cut area of 27 square kilometers. According to the relevant water resources report, the groundwater level in Kunming, Yunnan Province, which is relatively rich in water resources, is declining at an average annual rate of 0.1m ~ 0.31m. Can't these terrible facts and amazing figures attract our attention?
However, there are still various phenomena of wasting resources around us. On one occasion, several big brothers in our school turned on the tap to let students wash their hands and fought with water. Seeing this, I quickly went forward and turned off the tap. However, several brothers pushed me away and said, "It's none of your business, go away!" " . According to my observation, a similar phenomenon occurs in our life: in broad daylight, the office lights are on; In cooler autumn, air conditioners and fans are turning; Water from public taps often drips. When will these phenomena disappear? Do we have to wait until water resources are scarce and exhausted before we come back to talk about saving?
"Saving water" is not to limit people's use of water, let alone to prevent it. In fact, saving water is to make people use water reasonably and efficiently. Saving water does not affect our quality of life. Everyone has the obligation to cherish resources and correct others' waste of water resources. The view that "as long as I pay the water fee, I can squander it at will, and wasting water is my own business, and others can't control it" is wrong, and the view that "water is only 70 cents, which is very cheap, and it doesn't matter if it is used too much" is even more harmful. Saving water is the responsibility of every citizen.
China's water law points out that water resources are owned by the state, that is, by the whole people. All countries in the world also stipulate that water is public property. Therefore, everyone should have a sense of public water. Power resources are also very precious, which embodies the efforts of many people. Everyone should cherish and save water and oppose water pollution and waste.
"Look at the former sages and their families, they became thrifty and were defeated by luxury." Running a school with diligence and thrift is a public morality and a virtue.
Students, uncles and aunts, let's take action. Let's cherish resources and strive to build a conservation-oriented society.
My speech is over, thank you!
When it comes to saving water, we must first understand what water is. Humans have known and used water for a long time. Water is colorless, tasteless, odorless and transparent, and it is the most common liquid in nature. Ancient philosophers believed that water was the source of all things, and all things returned to water, so water, fire, air and earth have always been regarded as the four basic elements that constitute all things in the world. It was not until 1784 that cavendish, a British scientist, proved that water is not an element, but a product of the combination of two gases. 1809, the French chemist Grusack determined that 1 volume of oxygen and 2 volumes of hydrogen were hydrogenated to generate 2 volumes of water vapor. Later, scientists determined the molecular formula of water: H2O. As a liquid, water can play a variety of roles, which cannot be replaced by most other substances. This is mainly due to some strange temper of water. For example, water has the highest density at 4 degrees Celsius, and its volume expands when it gets cold, so ice is lighter than water and floats on the water. Ice is not good at heat transfer, so it will not freeze to the end to ensure the safety of underwater creatures in winter. The heat capacity of water is large, which is 10 times that of iron, 5 times that of sand and 4 times that of air, so the maritime climate is mild, and the human body also relies on water to keep its body temperature. Three states of water (water, ice and steam) can exist in the natural state; The cohesion and surface tension of water make it possible for water to be "contained" in the gap between rocks and soil, so that water can "climb" the high treetops and send water and nutrients to plants; Almost anything can be dissolved in water, so fish can get oxygen from water. Many things can be done this way or that way, and there will always be a way. For example, lighting, without electric lights, we can light candles; Without candles, we can light oil lamps; Without oil lamps, we can light the torches of Song and Ming Dynasties. There is not even a torch, so we have to wait quietly for the night to pass and the day to come. It's different for water. Without water, we can't wash our faces and brush our teeth, we can't quench our thirst, we can't see fish and shrimp on the dining table, we can't see flowers and trees, we don't know what swimming is, all the boats and boats are scrapped, the concrete can't stop, the tall buildings can't be built, and even the little dolls can't cry ... Alas, it's better not to think about it! On earth, where there is water, there is life. All life activities originate from water. Water in human body accounts for about 65% of body weight. Among them, the brain water content is 75%, the blood water content is 83%, the muscle water content is 76%, and even the hard bones contain 22%! Without water,