If we don t conserve water, what kind of water shortage will we face?

In some cities, there is a situation where natural water sources** do not meet the required water consumption or contaminated water sources do not provide enough clean water. Water scarcity should be addressed through the following measures:1

building reservoirs or diverting water across river basins to replenish supplies; 2.Reform the water use process and reduce water consumption through various methods such as urban sewage recycling; 3.Develop new technologies and use new water sources, such as desalination, artificial rainfall, etc.

Water pollution is called water pollution because human activities change the nature and organization of natural water, affect the use value of water or endanger human health. There are four types: (1) Physiological pollution, which refers to the deterioration of smell, taste, appearance, and transparency caused by pollutants discharged into natural water bodies; (2) Physical pollution refers to the change of the physical properties of water after pollutants enter the water body.

Such as heat, radioactive materials, oil, foam and other pollution. (3) Chemical pollution refers to the chemical characteristics of water changed after pollutants are discharged into the water body. Such as acid and alkali salts, toxic substances, pesticides, etc.

4) Biological pollution refers to the discharge of pathogenic microorganisms into water bodies to directly or indirectly transmit various diseases. There are three harms of water pollution: (1) Harm to the environment, leading to the reduction or extinction of organisms, reducing the value of various environmental resources, and destroying the ecological balance.

2) Harm to production, polluted water due to the failure to meet the requirements of industrial production or agricultural irrigation, resulting in reduced production. (3) Harm to people, if people drink polluted water, it will cause acute and chronic poisoning, cancer, infectious diseases and some other strange diseases, and the sensory deterioration caused by polluted water will cause inconvenience to people's lives and adversely affect their emotions.

Without water to drink, plants will not survive, human beings will die, and there will be no living life on earth. We also said goodbye.

Water scarcity is not just caused by a waste of water.

According to scientific measurements, if the "dripping" keeps flowing, it can collect kilograms of water within 1 hour and tons of water within 1 month. This amount of water is enough to provide a person with half a year's living needs. It can be seen that every drop of water should not be wasted.

Water has a huge impact on the planet and its inhabitants, whether it's in homes, factories, or rural areas. More than two-thirds of the human body is water, and we drink water every day to replace the water lost when sweating and breathing to stay healthy. A person cannot survive without drinking water for more than four days, and it takes a ton of water a year to maintain a healthy life.

I suddenly realized what a philosopher said: If we don't save water now, the last drop of water in the world will be our human tears!

As human beings, we can't do earth-shattering things to save water, but we can do it ourselves. For example, when we see someone wasting water, we can actively promote the meaning of water conservation; When we see that some faucets are dripping, we can walk over and turn them off; Make good use of water resources, collect your own washing water, wash your own clothes, and rinse toilets. Someone has made a statistic that if each of China's 1.3 billion people saves a drop of water, 45 tons of water will be saved!

What an astonishing data, reminiscent of the motherland's thousands of miles of Yangtze River and the surging Yellow River, aren't they also made up of drops of water?

Students, let us join hands, start from me, start from now, carry forward the traditional virtues of the Chinese nation, save every drop of water, and work hard to build our beautiful home together!

Water conservation has always been a habit we advocate, and it is an environmental awareness of rational use of water resources, so as to avoid a global crisis caused by water shortage.

However, we all know that water can be recycled. Whether it is water in the sewer or in the sea, it will eventually evaporate and circulate in the form of fresh water.

Since water will return in various forms, why should we advocate for "water conservation"?

Some people say that it is more accurate to call our earth "water ball", but it seems that there is not much fresh water that can be directly drunk by human beings, and many places on the earth are very restrained in order to use water for domestic use, and some even have no water to drink, and saving water has always been an act advocated by the world.

Now the water on the earth is brackish water, including seawater, brackish lakes and highly mineralized groundwater, etc., these brackish water is difficult to be directly used, and the fresh water on the earth accounts for about the total amount of water, but most of it exists in the form of ice and snow in the north and south poles, mountain glaciers, etc., which is difficult to develop and utilize with our current technology.

Some people will say that there is water underground, but we need to know that the current deep groundwater is difficult to extract, and some fresh water cannot be used by people, so the fresh water we can really use only accounts for 7/100,000 of the total water on the earth! This may seem like a small number, which makes people feel the scarcity of fresh water, but it should be understood that the total amount of water on the planet is constant.

The water on the earth becomes water vapor into the air through evaporation, and the water vapor will return to the ground in the form of rain and snow under the appropriate natural conditions, and the water is constantly circulating on the earth, from this point of view, the fresh water on the earth will not be exhausted, but if the fresh water that can really be used directly by us is developed and used without control, it will be exhausted, because what we need is clean fresh water.

Therefore, don't simply think that water is recycled and can be used uncontrollably, as the population increases, water shortage will only intensify, although there will be various technologies, but relatively speaking, the easiest thing for us to do is to save water.

Because there are not many freshwater resources. It is true that seawater can be considered inexhaustible, but freshwater resources that can wash and drink water need to be treated before they can be owned, and this is not something that can be produced quickly.

Because inexhaustible water refers to seawater, seawater is inexhaustible, but the fresh water that human beings rely on for survival is very small, and we are advocated to use water sparingly because freshwater resources are limited.

Because although the water in nature is inexhaustible, the freshwater resources are very scarce, so we should also be encouraged to save water.

A dripping faucet can waste 1 to 6 litres of water a day, and a leaky toilet can waste 3 to 25 litres of water a day. So we have to cherish every drop of waterWater is not inexhaustible, inexhaustible, save water, we must start from everything around us, from the bits and pieces of life.

A drop of water is insignificant, but if it keeps dripping, the amount is considerable.

It was determined"Dripping"Kilograms of water can be wasted in 1 hour; Tons of water can be collected in 1 month. This amount of water is enough to supply a person's daily needs. It can be seen that every bit of waste should not be there.

The continuous line of small water flow can collect 17 kg of water per hour and 12 tons of water per month; Boom"Big water"It can collect 670 kilograms of water trapped oak per hour and 482 tons of water per month. It can be seen that water conservation should start from a little bit.

A drop of clear water, a piece of green space, a piece of earth. Water is the source of life, please save water. Fresh water is decreasing, and waste is not good. If you don't save money, the consequences can be small.

The volume of water on the earth is about 100 million cubic kilometers, of which the oceans account for 100 million cubic kilometers (approx; Glaciers and ice sheets occupy 100 million cubic kilometers (approx; Groundwater accounts for 100 million cubic kilometers (approx; Lakes, inland seas, and rivers account for 250,000 cubic kilometers (approx.; Water vapor in the atmosphere accounts for 10,000 cubic kilometers (approx.) at any known time.

Water is the source of life, without water there is no life, and water has always played a vital role in the history of human civilization. Egypt, ancient Babylon, India, and China, the ancient civilizations of the world, all developed in the great river basins. The countless rivers on the earth are like countless natural water pipelines, and many lakes, large areas of wetlands and abundant groundwater are often formed in the river basins, providing human beings with water resources that are easy to develop and utilize.

a. Everyone's daily drinking water is to meet the requirements of human health, and can not harm people's health in order to save water, which is an unfeasible practice, so the symbol is inscribed

B, the use of water-saving sanitary ware, can save water, but not in line with the topic c, sprinkler irrigation technology, compared with the previous flood irrigation, to prevent the evaporation and leakage of water, to prevent the loss of water but not in line with the topic

d. One water is multi-purpose, which can save water, but it is not in line with the topic

So choose A

Now the earth is moving towards steamers, and if people don't save money, they may be steamed faster.

First of all, the world will lose people.