Urgent Essay Our Future Energy, Our Future Energy

Water is the source of life, and water conservation cannot be ignored!

Although water is recycled in nature, the amount of water used by humans is much higher than the water that can be used by humans, and water conservation is a matter for each of us.

All should be done.

I feel that both used water and polluted water can be reused. For example, the water used to wash vegetables and clothes can be flushed to the toilet, and the polluted water can be used in all possible situations, which not only reduces the water bill, but also achieves the purpose of saving water. The urban sewage should be reused more often for public facilities and residential toilets, watering green spaces, landscape water, watering roads, etc., in this way, the recycling effect of sewage has been improved a lot!

Do you know? There is water on the earth, but some of this water is saltwater, and most of the saltwater is ocean water, which cannot be drunk, because there are 39g of salts in 1kg of ocean water; And this water is freshwater, and most of the freshwater is glacier water and deep groundwater, which account for 99% of freshwater, and the water available for our human use is only freshwater, and our water resources are very small. China is a water-scarce country, so we need to save water and protect it.

The use of water is ubiquitous in life, and the sewage discharged from factories can also be recycled after purification, but there is also a cost, such as the cost of purification, which in turn consumes resources.

Rain is something we've all seen. Of course, it's hard to say if you have thought of using rainwater. Scientists all believe that rainwater is actually a rare wealth, it is also a water resource, and quite precious, but, from a national perspective, China's rainwater collection and utilization rate is still very low, we should use scientific development thinking to look at rainwater, with scientific means to treat rainwater, let rainwater stay, be used scientifically and recycledly, and then scientifically send it or into the ground or into rivers and lakes.

Isn't this a way to make the most of water resources?

In fact, most people know the preciousness of water, but they also choose to forget. How many people don't know how to save water? How many people waste water?

I'm afraid it's a lot. This is related to publicity, I think, there should be a lot of ** on the use of resources on TV, ** propaganda is also very important, and the flowers of the motherland in the new era should develop a good habit of saving water from an early age, you know, we human beings, can not do without water, the whole earth, can not do without water!

Moreover, water conservation has many benefits, not only to alleviate the contradiction between supply and demand of water resources, reduce the pressure of urban development on the environment, but also to continue the construction investment of water supply and sewage treatment facilities, and reduce the operating costs of water supply and sewage treatment facilities. From a strategic point of view, saving water is definitely a good thing!

Water conservation is not the efforts of one person, but the efforts of thousands of people, but no matter what method is used, we should take immediate action and turn ideas into action.

The energy of our future.

In recent centuries, with the rapid development of the global economy and the rapid increase in energy consumption, traditional fossil fuels such as coal, oil and natural gas are in danger of being depleted, and according to experts, traditional fossil fuels can be maintained until the middle of this century at most. In addition, people do not cherish resources, and there are still many people who are ignorant of the lack of energy on the earth, and are frantically wasting fuels such as water, electricity, and coal.

Mankind has long been trying in every possible way to find new alternative energy sources from solar energy, hydropower, wind energy, and bioenergy. These energy sources are important, but experts believe they all have their own limitations. The energy flow density of solar energy is too low, and it changes greatly with day and night, rain and shine, and seasons, making it difficult to become a large-scale industrial energy source, which can only meet the needs of families and some special needs; The growth rate of hydropower cannot keep up with the growth rate of energy consumption, and has an immeasurable impact on the ecological and biological chains. The resources and utilization of wind, geothermal, and tidal energy also have their own limitations, and they will play little role in future energy development. Bioenergy is a renewable energy source that can be used on a large scale, but the rate of regeneration cannot keep up with the need for increased energy consumption.

In recent years, scientists have discovered that there is a considerable amount of helium-3 on the moon, which is no stranger to us!

Helium-3 is an isotope of helium that contains two protons and one neutron. Compared to tritium, it is a clean, efficient, and safe fuel for nuclear fusion power generation. It has a large energy for fusion reactions; The fusion reaction mainly produces high-energy protons, which will not form strong neutron radiation, which is more beneficial to environmental protection. It is not only non-radioactive, but also has no slow-emitting neutrons, no fission substances, less decay residual heat, easier maintenance and component replacement, and easier control, so it has been widely valued by the international nuclear fusion community.

We can build a base on the moon to mine minerals and send a space shuttle to deliver it.

According to experts' calculations, if the lunar rock and soil with a depth of 3 meters are excavated and processed in an area of 10 15 square kilometers, about 1 ton of helium-3 can be extracted, which is enough to ensure that a power generation set with a power of 10 million kilowatts can work for one year. For every kilogram of helium-3 burned, 19 megawatts of energy can be generated, enough to power the lighting of the city of Moscow for more than six years. Round-trip transportation with the U.S. Space Shuttle can bring back 20 tons of liquefied helium-3 at a time, which can supply the United States with electricity for a year.

China only needs about 10 tons of helium-3 per year to meet the annual energy needs. At the current level of global energy demand, 100 tons of helium-3 a year would meet the world's consumption, and these helium-3s would be enough to be transported by the space shuttle three or five times a year. According to this calculation, the helium-3 on the moon could be used by the Earth for thousands or even tens of thousands of years.

What a resource!

Maybe one day in the future, a base will really be built on the moon to continuously deliver energy to us, so let's strive for that goal!

When I was in school.

Students, do you say that going to school is bitter, and some people say that going to school is not bitter but sweet? Some people say that it is very good to get 100 points, and some people say that 100 points are very difficult to get it. Students, I want to ask you whether your study is bitter or sweet?

I know that if you don't study well and can't get a high score, it will be very hard to study. If you study well and get a high score in the exam, you can get a 100 points at every turn, and your study will naturally be sweet. Me!

I didn't study very well, but I wasn't bad either. You know why I say that, because my scores are high and low.

And those who study well have high scores.

Today, the world is developing rapidly and life is changing with each passing day, but economic life is inseparable from energy consumption. And the consumption of energy and the environmental pollution caused by the world's problems, so what will we do in the future? How can we keep our world developing sustainably and have a better tomorrow?

First of all, we should save energy, we should save electricity, we should turn off the lights at will, save water, and make resources secure, so that we can delay the use of resources.

In the future, we will have to learn from each other's strengths, and we can use solar energy in the tropics, which can not only bring electricity to the people in the tropics, but also protect the environment; In the vast grassland, wind energy can be used, so that the grassland people have enough electricity to live, work and develop; If you live near the sea, you can use ocean energy, after all, seawater makes up 57% of the earth, and we can take hydrogen from seawater. Hydrogen is the most common element in the universe, with hydrogen and its isotopes accounting for 84% of the total mass of the Sun and 75% of the mass of the universe. Among the many new energy sources, hydrogen energy stands out for its unique advantages such as light weight, no pollution, high calorific value and wide application, and will become the most ideal new energy in the 21st century.

Hydrogen energy can be used in aerospace, automotive fuels, and other high-heat industries.

However, the most likely application in the future is nuclear energy, which is the energy released from the nucleus by converting its mass, but there are many problems with nuclear energy: low resource utilization, nuclear waste generated after the reaction has become a potential factor that harms the biosphere, its final treatment technology has not been fully solved, reactor safety issues still need to be continuously monitored and improved, and nuclear non-proliferation requirements are constrained, that is, the plutonium-239 generated in nuclear power plant reactors is controlled, and the investment cost of nuclear power construction is still higher than that of conventional energy generation. The investment is risky.

Geothermal energy is also a more likely application of electricity in the future, and the heat source of the earth's interior can come from gravity differentiation, tidal friction, chemical reactions, and energy released by the decay of radioactive elements. Radioactive heat energy is the main source of heat on Earth. China's geothermal resources are abundant and widely distributed, with 5,500 geothermal hotspots and 45 geothermal fields, with a total geothermal resource of about 3.2 million megawatts.

In short, at a time when the existing resources are about to be exhausted, with the joint efforts of the international community, the vast number of energy scientists will surely find safe and effective new energy sources to benefit mankind and make our future better.

And the Chinese nation will also stand proudly on top of the world under the impetus of new energy!

Forehead... That's how you write essays, huh?

I just finished reading this book, "New Energy War", you read this book, I believe it is very helpful to you, the material in it is more authoritative, and the point of view is relatively novel.