To what extent has the ocean been polluted?

In addition to marine plastic pollution, there is also a declining pH of seawater. Ocean acidification is not alarmism among scientists, but a real change. Scientists have been measuring ocean acidity on a regular basis since the late 80s of the last century, and the pH of the ocean has dropped from then to now, which means that in just 30 years, ocean acidity has increased by 12 !

It is hard to imagine that such high concentrations of pollutants can be found in the Mariana Trench, far from the industrial zone, almost 7,000 kilometers away from each other and more than 10,000 meters deep. This shows that humans have already affected the marine environment to a great extent, and pollution has reached the deepest part of the earth!

People in coastal areas in order to make better use of marine resources, will develop marine aquaculture industry, which can bring considerable economic benefits, promote the development of local economy, but if you do not pay attention to environmental protection, when developing animal breeding, only pay attention to economic factors, it will lead to and cause environmental pollution from the ocean itself, so that not only the fish, shrimp, shellfish will get sick and die, but also will cause serious seawater pollution.

The oceans have long been the most stable ecosystems on the planet due to their vast size and huge water reserves. The various substances that flow into the ocean from the land are accepted by the ocean, but the ocean itself has not changed significantly. However, in recent decades, with the development of social economy and the continuous growth of population, more and more waste is generated in the process of production and life.

The vast majority of this waste ends up in the ocean, either directly or indirectly.

In my opinion, there are many causes of marine pollution, but the main reason is the human factor, the rapid economic development in coastal areas, there are more factories and enterprises, if these factories and enterprises do not pay attention to environmental protection, directly discharge wastewater and other pollutants into the ocean, which will cause seawater pollution.

After the sea water is polluted, there will be a certain difficulty in treatment, so marine pollution should be mainly prevented, so that many disasters can be reduced. The cause of seawater pollution is mostly because of seawater eutrophication, so we should try our best to reduce seawater eutrophication, and now practice has proved that the cultivation of seaweed groups has a very good potential to reduce eutrophication, so we can vigorously develop seaweed cultivation to regulate the ecological balance of animals and plants in the breeding environment, and purify the polluted seawater.

The problem of global marine pollution is becoming more and more serious, and China's marine pollution is also relatively serious, and the phenomenon of red tide often occurs in coastal areas, which is a clear sign of marine pollution, and the pollution of the marine environment, especially the pollution of coastal waters, has become a problem of common concern to all countries in the world.

Take the plastic waste we see every day, the ocean has begun to seriously affect human health after being polluted by garbage! A recent scientific report published in the journal Nature pointed out that plastic pollution in the ocean does not only occur in fish, but also in the sea salt we eat every day.

Marine pollution has become more and more serious, and the bodies of animals are already full of garbage, so let's protect the environment.

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, 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.

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.

1. Coastal industrial enterprises directly discharge sewage into the sea.

2. Rivers that flow into the sea, and these rivers have enterprises in the area through which they discharge sewage into the water body.

3. Due to the exhaust gas with pollutants emitted into the atmosphere, acid rain is formed, causing rainfall to enter the sea.

4. Overfishing destroys the ecological balance of the ocean.

5. Waste abandonment, pollutant leakage, and organic matter leakage from transport vessels.

6. Leakage and omission caused by marine underground mineral mining.

Marine pollution usually refers to the destruction of marine ecosystems by humans who have altered the original state of the ocean. Pollution caused by harmful substances entering the marine environment can damage biological resources, endanger human health, hinder fishing and other human activities at sea, and damage the quality of seawater and the environment.

The oceans have long been the most stable ecosystems on the planet due to their vast size and huge water reserves. The various materials that flow into the sea from the land are accepted by the ocean, but the ocean itself has not changed significantly.

However, in recent decades, with the development of the world's industry, the pollution of the ocean has become increasingly serious, which has greatly changed the local sea environment and has a tendency to continue to expand.

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.

(1) Industrial production discharges wastewater into the ocean and pollutes the ocean; (2) Cooling water discharged from nuclear power plants brings waste heat pollution to the ocean; (3) Occasional wrecks of offshore oil platforms and oil tankers, resulting in oil spills and pollution of the ocean; (4) port construction and other production activities near the coast, waste pollution of the ocean;