Why the Ocean is the New Hope of the 21st Century 5

A: The reason why the ocean is the hope of humanity in the 21st century is 1When humanity is facing an energy crisis, marine mineral resources can be exploited; 2.

When human food is scarce, they can ask for high-protein things from the ocean; 3.When there is a shortage of electricity for human beings, the movement of seawater can be used to generate electricity; 4.When there is a water shortage in human settlements, the method of desalination of seawater can be used to alleviate the water shortage in many arid areas on the earth; 5.

When the living space of human beings is narrow, human beings can build undersea cities to open up the living space of human beings.

1.The oceans are rich in mineral resources, and human efforts to exploit them can alleviate the "energy crisis" on the planet. 2.

Humanity is facing the threat of food scarcity and has to turn to the ocean for food. 3.The use of seawater to generate electricity will bring endless and inexpensive electricity to mankind.

4.The use of desalination can alleviate water scarcity in many arid regions of the planet. 5.

Building cities on the seabed can open up the living space of human beings.

Marine resources. According to the nature or function of resources, they are divided into marine living resources and water resources. About 85% of the world's aquatic products are produced in the ocean.

With fish as the main body, it accounts for more than 80% of the world's total marine aquatic products, and there are also abundant algae resources. Seawater is rich in seawater chemical resources, and more than 80 kinds of seawater chemicals have been discovered. Among them, 11 elements (chlorine, sodium, magnesium, potassium, sulfur, calcium, bromine, carbon, strontium, boron and fluorine) account for more than the total amount of dissolved substances in seawater, and more than 50 kinds of chemical substances can be extracted.

Due to the movement of seawater, marine power resources are generated, mainly including tidal energy, wave energy, ocean current energy, and temperature difference energy and salt difference energy caused by temperature difference and salt difference of seawater. It is estimated that the available power of global seawater temperature difference energy is 100 10 8 kilowatts, and the renewable power of tidal energy, wave energy, river energy and seawater salt difference energy is about 10 10 8 kilowatts.

The land area is less than 40% of the ocean area, and there are many land resources that are basically discovered and exploited, while the marine resources that are discovered and exploited are less than 1%, so.

The blue ocean, choppy and boundless. Since the dawn of human society, people have had a very close relationship with the ocean. The ocean has made it easy for humans to navigate; It generously provides humans with an abundance of aquatic products and daily indispensable table salt.

However, when the ocean loses its temper, it can also ruthlessly overturn ships, break seawalls, destroy coastal towns, and bring terrible disasters to mankind.

For thousands of years, people have loved and revered the ocean. In the face of the moody ocean, people can only "look at the ocean and sigh".

Today, due to the rapid development of science and technology, mankind is ushering in a new era of developing and utilizing the ocean.

Scientists have discovered that the ocean is a cornucopia, rich in oil, natural gas, coal, iron, copper, tin, manganese, sulfur, etc. At present, the coal, oil and other mineral deposits on land have become less and less due to long-term exploitation, and many parts of the world are experiencing an "energy crisis". In order to solve this problem, mankind has turned its attention to the ocean and is committed to the development of marine mineral resources.

Today, offshore oil platforms have stood in the waves, oceanographic research ships have sailed to the depths of the ocean, and advanced seabed probes have also dived into the deep sea to show their might.

Due to the rapid growth of the world's population, coupled with the deterioration of land desertification and ecological environment, human beings are facing the threat of food shortage. Scientists have long called for this: humans should ask for food from the oceans!

It can be expected that in the 21st century, more and more high-protein foods will come from the ocean.

The energy of the waves and tides used to be wasted, and it is no longer a dream to use the movement of the sea to generate electricity. The establishment of tidal power stations and seawater temperature difference power stations will bring endless and inexpensive electricity to mankind.

In addition, the use of seawater desalination to alleviate water shortages in many arid regions of the earth, and the construction of cities on the seabed to open up the living space of human beings will also turn from fantasy to reality.

However, in order for mankind to develop and utilize the oceans, it is first necessary to protect the oceans and cherish their resources. Only then will the ocean be happy to make its offerings.