Although water circulates in nature, the water consumption of human beings is far higher than the water that human beings can use. Saving water has become a matter for everyone.
What everyone should do.
In my opinion, used water and polluted water can be reused. For example, the water for washing vegetables and clothes can be used to flush toilets, and the polluted water can be used as much as possible, which not only reduces the water fee, but also saves water. Urban sewage should be reused for public facilities and houses to flush toilets, water green spaces, landscape water and water roads. In this way, the recycling effect of sewage will be improved a lot!
Do you know that?/You know what? Do you know that?/You know what? 70.9% of the earth is water, but 97.47% of the water is salt water. Most of the salt water is ocean water, so you can't drink it, because there are 39G salt substances in 1KG ocean water. And 2.53% of these waters are fresh water, mostly glacial water and deep groundwater, which account for 99% of fresh water, and the water available for human use only accounts for 0.3% of fresh water, so our water resources are very small. China is a country short of water, so we should save water and protect water resources.
The utilization of water resources is everywhere in life, and the sewage discharged from factories can also be purified and recycled, but there are also costs, such as the cost of purification, which in turn consumes resources.
Rain is something that everyone of us has seen. Of course, it's hard to say if you have ever thought about using rainwater. Scientists all believe that rain is actually a rare wealth and a kind of water resource, and it is quite valuable. But from a national perspective, the collection and utilization rate of rainwater in China is still very low. We should treat rainwater with scientific development thinking, treat rainwater with scientific means, keep it, and send it to underground or rivers and lakes after scientific recycling. Isn't this a way to make full use of water resources?
In fact, most people know the value of water, but they also choose to forget it. How many people don't know how to save water? How many people waste water resources? I'm afraid it's a lot. This is related to publicity. I think TV should broadcast more questions about resource utilization, and government propaganda is also very important. The flowers of the motherland in the new era should form a good habit of saving water from an early age. You know, we humans can't live without water, and the whole earth can't live without water!
In addition, saving water has many advantages, which are not only conducive to alleviating the contradiction between supply and demand of water resources and reducing the pressure of urban development on the environment, but also conducive to continuing to invest in the construction of water supply and sewage treatment facilities and reducing their operating costs. From a strategic point of view, saving water is definitely beneficial and harmful!
Saving water depends not on one person's efforts, but on the efforts of thousands of people in Qian Qian. However, no matter what method you use, you should act immediately and turn your thoughts into actions. You know, water is decreasing day by day, so it is urgent to save water!
Future energy
Now, every country needs energy. You see, some countries are arguing endlessly about energy, and some countries are prepared for war for energy and want to plunder energy by force (for example, the war between Iraq and Kuwait, the maritime territorial dispute between Indonesia and Malaysia). It can be seen how important energy is, because most of the TV universities we use now use coal as energy for development and utilization; Most of the cars running on the street are driven by gasoline or diesel, which are extracted from underground oil; Most cooking at home uses gas and natural gas.
It is said that the exploitation and use of oil, coal and natural gas will cause different degrees of pollution to the environment!
So, what if one day the underground oil, coal and natural gas are all mined out? Perhaps, in less than 100 years, the underground energy on the earth will be exhausted. At that time, because there was no electricity, the TV would not turn on, the air conditioner would not turn on, the computer would become waste, and even the lights would not turn on at night; Because there is no oil and coal resources, planes, trains, ships and cars can't move. In this way, we can only go to school by carriage or bicycle. At night, it is dark in the street and at home, and we can only burn firewood at home to illuminate our homework. Wow! Is this terrible? !
It is said that there is another kind of energy that uses water to generate electricity, but the development of hydropower will intercept rivers and affect the ecological balance on the earth!
I don't want to see quarrels and wars in the world. I hope the world is full of joy and peace. So I fantasize that it would be nice if every household had a "micro-energy device". This energy device does not need us to destroy underground resources, and can absorb and store all natural energy such as solar energy and wind energy at any time (if it is placed at the seaside, it can also be used at any time).
Absorb and store the kinetic energy generated by the tides ...) and release it to everyone whenever and wherever energy is needed. If you need a lot of energy power (such as airplanes, trains and ships), you can combine many "micro-energy devices" to provide energy. In this way, with this "micro-energy device", every country in the world may not quarrel or wage war again; And it will certainly not cause environmental pollution, nor will it destroy the ecological balance; At the same time, it can beautify our city, because we don't need those ugly telephone poles, electric towers and cables wrapped around the streets like cobwebs; In addition, this kind of "micro-energy generator" can completely eliminate the health damage caused by radiation generated by electromagnetic waves without high-voltage substation.
Perhaps in the near future, "micro-energy devices" will appear, bringing peace, health and happiness to mankind!