What human actions contribute to marine pollution

If the marine environment is polluted, the marine organisms will inevitably be implicated, and seafood is one of the most important foods for people, so that people will be implicated and use some contaminated food, which will cause people to get sick and threaten people's lives. It's like Minamata disease in Japan.

Marine pollution is characterized by many sources, strong persistence, wide spread, and difficult to control. The turbidity of the sea caused by marine pollution seriously affects the photosynthesis of marine plants (phytoplankton and seaweed), thus affecting the productivity of the sea and is also harmful to fish. Toxic substances such as heavy metals and toxic organic compounds accumulate in the sea area and cause poison to marine animals and other animals that feed on them through the enrichment of marine organisms.

Oil pollution forms a vast oil film on the surface of the ocean, preventing oxygen from the air from dissolving into the seawater, and the decomposition of oil also consumes the dissolved oxygen in the water, causing a lack of oxygen in the seawater, which is harmful to marine life and harms seabirds and humans. Red tides (the result of eutrophication) caused by aerobic organic matter pollution cause a lack of oxygen in seawater, resulting in the death of marine life. Marine pollution can also damage coastal tourism resources.

Therefore, marine pollution has attracted more and more attention from the international community.

Environmental problems are a complex complex of problems facing humanity, and it is difficult to fully understand them in the limited space here. Global atmospheric environmental problems include ecological destruction, environmental pollution and global warming, ozone layer depletion, acid rain, etc. There are other more prominent aspects of environmental problems, such as energy and resource problems, marine pollution problems, transboundary movements of hazardous wastes, urban environmental problems, water crises, biodiversity loss, etc.

1. Industrial production discharges sewage into the ocean;

2. Pollution from chemical fertilizers and pesticides used in agricultural production;

3. Shallow beach aquaculture.

4. Marine shipping and port construction.

5. Offshore oil exploitation.

6. Domestic sewage discharge in coastal cities.

Offshore oil and gas fields are leaking, sewage is being discharged from upstream rivers, oil tankers are leaking at sea, and there are nuclear fuel leaks such as the Fukushima nuclear power plant.

1. Industrial production discharges sewage into the ocean;

2. Pollution from chemical fertilizers and pesticides used in agricultural production;

3. Shallow beach aquaculture.

4. Marine navigation and port construction.

5. Offshore oil exploitation.

6. Domestic sewage discharge in coastal cities.

01 41% of the world's marine areas are strongly affected by 17 different human activities, including offshore oil extraction, commercial and surplus, invasive species caused by human activities, fishing, and various anthropogenic pollution. The effects of human activities have spread across the world's oceans. There is no doubt that almost all pollution in the oceans is caused by humans.

Forty-one per cent of the world's oceans are strongly affected by 17 different human activities, including offshore oil extraction, commercial shipping, invasive species caused by human activities, fishing and various anthropogenic pollution. The effects of human activities have spread across the world's oceans. There is no doubt that almost all of the pollution in the oceans is caused by humans.

In the last 50 years, the amount of waste dumped into the ocean by humans has increased 20-fold, and the increase is still increasing. In particular, there are more and more supertankers of 100,000 tons coming and going between the oceans, and a reef accident or collision accident often causes tens of thousands of tons or even hundreds of thousands of tons of oil to leak, seriously threatening the survival of fish and other marine life.

At present, 80% of marine pollution comes from land, and the transfer of land-based pollutants to the sea is the main source of global marine pollution. Pollutants formed on land should be treated on land to meet discharge standards and then dumped into the ocean with restrictions. However, this is not the case, and large quantities of untreated land-based pollutants are entering the oceans directly or indirectly, and are increasing.

In addition, soot and some chemicals from the atmosphere continue to enter the oceans, and radioactive materials deposited in deep waters in some countries continue unabated.

On November 1, 2011, the Blueprint for Sustainable Development of Oceans and Coastal Areas compiled by UNESCO and other institutions was released in Paris. The report notes that while the ocean covers about 70 percent of the Earth's surface, only 1 percent is protected. As pollution continues to accumulate, the marine environment is worse than most people think.

The most important part of exploring the oceans is the exploitation of resources.

There are a large number of mineral resources, oil resources and deep-sea organisms in the depths of the ocean, which have great scientific research and economic value. Therefore, deep-sea exploration is of great significance for the study and utilization of deep-sea ecology, the exploitation of deep-sea petroleum and mineral resources, and the study of deep-sea geological structure.

The ocean covers 70% of the total area of the earth and more than 90% of the earth's living space. In fact, in the vast ocean world, the ocean influences climate and weather phenomena on land, and a large number of marine flora and fauna are important food for humans**.

Oceans sail between continents and countries around the world, and about half of the world's population lives in coastal areas. Changes in the Earth's oceans will directly affect our lives on land, so it is necessary for us to detect this change earlier, in addition to increasing people's knowledge of the ocean for safety and economic benefits, exploring the ocean floor will also satisfy human curiosity and thirst for unknown knowledge.

Characteristics of marine pollution:

1. Pollution sources are wide, not only human activities in the ocean can pollute the ocean, but also the pollutants produced by human beings on land and other activities will eventually flow into the ocean through river runoff, atmospheric diffusion, rain and snow and other forms of precipitation.

2. Strong sustainability, the ocean is the lowest area on the earth, and it is impossible to transfer or eliminate pollutants through a rainstorm or a flood season like the atmosphere and rivers; Once pollutants enter the ocean, it is difficult to transfer them out, and insoluble and non-decomposable substances accumulate in the ocean, often through biological concentration and food chain transmission, posing a potential threat to human beings.

3. The global ocean is an interconnected whole, and if a sea area is polluted, it will often spread to the surrounding area, and even some later effects will affect the whole world.

Marine pollution causes toxins to accumulate in marine aquatic products, which can cause diseases after human use. Due to marine pollution, marine organisms die or deform, change the ecological balance of the entire ocean, and also cause the relocation of fishing grounds, the death of fish stocks, the flooding of red tides, the abandonment of some tidal flat farms, and the loss of some precious marine resources. Pollution of the oceans can lead to the death of plankton, reduce the ocean's ability to absorb carbon dioxide, and accelerate the greenhouse effect.

Causes of marine pollution

1. Land-based pollution: seas, rivers and other ways enter the ocean. The application of chemical pesticides on coastal farmland, and the disposal and piling of garbage and waste on the shore and beach can also cause pollution damage to the environment.

2. Ship pollution: Ships on board discharge oil or other harmful substances into the sea for various reasons. Ship pollution mainly refers to the pollution of the surrounding water environment and atmospheric environment caused by ships in the process of navigation, berthing at ports, loading and unloading of goods.

3. Marine accidents: ship grounding, aground, collision, vertical oil blowout and oil pipeline leakage, etc.

4. Marine dumping: a treatment method for dumping waste into the ocean to reduce land environmental pollution. The act of disposing of debris or other hazardous substances into the sea through ships, aircraft, platforms or other means of transport.

It also includes the abandonment of ships, aircraft, platforms and other floating instruments.

5. Coastal engineering construction: Some coastal engineering construction has changed the natural characteristics of coasts, tidal flats, subtidal zones and their subsoils, and destroyed the ecological balance and coastal landscape of the ocean.

1.Regulate the climate.

2.A variety of marine resources are available.

3.Participate in and complete various cycles in nature (e.g. water cycle, etc.).

4.Expand the space for human life and activities.

Human beings have produced a large amount of pollution in the process of continuous production and life, and these pollutants continue to flow into the ocean through our different ways, causing different degrees of pollution to the biological resources in the ocean, marine development, and the quality of the marine environment.

1. Water eutrophication in local sea areas, the harm caused by this pollution is a hazard to oxygen organisms, eutrophication of water bodies will cause some algae plants in the ocean to grow wildly, resulting in red tide phenomenon, which will make most of the marine organisms either migrate or die.

2. The imbalance of the marine ecosphere and the decline of ecological balance.

3. Based on the law of conservation of mass and the law of immortality of matter, the pollutants we create enter the marine ecology, and marine organisms die because of toxins, and these toxins will eventually enter our human bodies.

4. Destroy the environmental quality of coastal tourist attractions and reduce their value.