The ocean of life is the cradle of human beings: the origin of life has always been a research topic for scientists. Judging from the current research results, it is generally believed that life originated in the ocean. Water is an important part of life activities, and the protection of seawater can effectively prevent ultraviolet rays from killing life. The earth was formed about 4.5 billion years ago. About 3.8 billion years ago, when the earth was still barren, life-the most primitive cell-began to multiply in the roaring ocean, and its structure was very similar to that of modern bacteria. After about 65438+ billion years of evolution, primitive cells in the ocean gradually evolved into primitive unicellular algae, which may be the most primitive life. Due to the reproduction and photosynthesis of primitive algae, oxygen and carbon dioxide are produced, which prepares the conditions for the evolution of life. After hundreds of millions of years of evolution, this primitive unicellular algae produced primitive jellyfish, sponges, trilobites, nautilus, clams, corals and so on. Fish in the ocean appeared about 400 million years ago. Because of the attraction of the moon, the ocean tides are caused. At high tide, the sea beats against the coast; At low tide, large shoals are exposed to the sun. Some creatures that once lived in the ocean have been exercised in the intertidal zone at the junction of land and ocean. At the same time, the formation of the ozone layer can prevent the damage of ultraviolet rays and make it possible for marine life to land, and some creatures live on land. At the same time, countless primitive lives died in this drastic change, and the life left on the land withstood the severe test, adapted to the environment and gradually developed. About 200 million years ago, reptiles, amphibians and birds appeared. All mammals are born on land. Some of them returned to the ocean. About 3 million years ago, a highly intelligent human appeared. It can be said that the ocean is the cradle of mankind. The ocean nurtures human beings: the ocean accounts for 70.8% of the earth's surface area, and the global marine resources are very rich, which have not been fully developed and have great potential. There are a large number of metallic nodule minerals on the seabed, including 200 billion tons of manganese, 65.438+0.64 billion tons of nickel, 8.8 billion tons of copper and 5.8 billion tons of cobalt, which are equivalent to 40-65.438+0,000 times of the reserves on land. There are phosphate ore, sulfide ore and rare metal sand deposits on the seabed, and the reserves are also very considerable. The output of submarine oil and gas is increasing year by year, and it is predicted that the output will reach half of the world output after 10. Tidal energy, wave energy, ocean current energy, thermal energy and salinity energy in the ocean are clean energy, with huge reserves. There are 82 kinds of chemical elements that can be extracted from seawater, including nuclear fuel uranium, nuclear fusion substances tritium and deuterium. Marine life provides a large number of protein for human beings. With the development of science and technology, these resources will directly benefit all mankind. Current situation of the ocean: Looking at the earth and ocean today, we are saddened to see that the cradle of human life has already been scarred: while using the ocean, human beings have hurt the ocean mercilessly. With the development of modern industry and agriculture, the rapid growth of the world population and the improvement of human material life, the frequent activities at sea lead to the uncontrolled discharge of a large number of production and domestic wastes into the sea, which leads to serious marine pollution and frequent emergencies in various sea areas. These pollutions mainly include oil pollution, heavy metal pollution, organic pollution and radioactive pollution, in addition to urban sewage and pesticide pollution. The amount of various industrial wastes and household wastes has increased exponentially. In the past 50 years, the amount of garbage and waste dumped into the sea by human beings is 20 times that of the initial period, and the growth rate is still increasing. In particular, there are more and more 65438+ 10,000-ton supertankers shuttling between oceans. An accident such as hitting a rock and colliding with a ship often causes tens of thousands to hundreds of thousands of tons of oil pollution, which seriously threatens the survival of marine fish and other organisms. Some harmful and toxic substances accumulate in these organisms for a long time. Once inhaled, they will lead to large-scale diseases and affect human health. Data show that 80% of marine pollution comes from land, and the transfer of land-based pollutants to the ocean is the main source of marine pollution. Pollutants formed on land should be treated on land and dumped into the sea, but this is not the case. A large number of untreated land-based pollutants directly or indirectly enter the ocean, and it is getting worse. In addition, smoke and some chemicals in the atmosphere are constantly discharged into the ocean, and radioactive substances deposited in deep waters of some countries are also increasing. Today's oceans can no longer bear the increasing pollution burden. Humans can't wait until the blue of the ocean disappears before controlling pollution and renovating the ocean. We should take the example of being polluted in the past and restoring the appearance of the ocean after transformation to warn mankind that it is too expensive to use the ocean as a place to dump garbage and wash dirt. Protecting the ocean means protecting human beings: 2 1 century, the most important thing for human beings to achieve sustainable development is to make rational use of marine resources, protect the cradle of human life and realize the sustainable development of the ocean. How to realize the sustainable development of marine resources? I think we should do the following: formulate and implement the national marine strategy, enhance the public's marine awareness through universal education and professional education of marine knowledge, promote public participation in marine undertakings, and promote the improvement of national marine awareness and the establishment and development of new marine values, thus forming a new situation in which the whole people care about and protect the ocean, all sectors of society participate in the development of the ocean, and coastal people jointly develop and protect the ocean. It is necessary to further strengthen the investigation and exploration of marine resources, carry out marine functional zoning, and implement regional development and protection. The complexity of marine functions makes it necessary for marine management to fully consider the conflicts and trade-offs between various functions and resource utilization, and consider the social and economic requirements for the environment and the demand for resources in a specific historical stage, so as to formulate the objectives of marine resource development and environmental protection in each historical stage and form a benign interaction between marine development and utilization and regional environmental protection. Marine functional zoning is conducive to determining the projects suitable for development in different sea areas and avoiding the blindness, disorder and excessiveness of marine development. It is time to adjust the thinking of marine economic development, change the growth mode and increase the scientific and technological content. Strengthen basic research and cutting-edge technology research, deploy in advance in strategic fields such as information, life, space, ocean, nanotechnology and new materials, concentrate superior strength, increase investment, and enhance the stamina of sustainable development of science, technology and economy. We should vigorously carry out marine scientific research and guide the marine industry to take the road of cleaner production. At the same time, it is necessary to strengthen the protection of various marine resources, especially marine living resources, and control the over-exploitation and utilization of marine resources through necessary legal and administrative means. Under the guidance of the correct marine resources utilization policy, the correct implementation measures should be formulated to realize the sustainable development of marine resources. Let us remember what a philosopher once said: the ocean has nurtured us, and we should thank it. As descendants of the original cradle of life, our smooth skin, blood in blood vessels and water circulating in the body all belong to the ocean, and we are only a part of it. Protecting the environment means protecting ourselves-protecting the ocean means protecting the foundation of our existence.