Updated at: 25-09-2021 - By: Lucas

Marine pollution is really a big problem. It comes from all kinds of different sources. Some of the main causes of marine pollution are oil spills, chemical wastes, garbage dumps, and sewage.

If you are interested in the environment, you should know about marine pollution. The information provided in this article will help you understand this important subject.


Garbage Marine

Ocean pollution is caused by many different things. However, one of the main sources of ocean pollution comes from land-based activities. When garbage is not properly disposed of, it ends up in our oceans. When this happens, the garbage literally kills off a lot of the marine life in the ocean. J

ust imagine if you dumped a bucket full of dirty water into a lake. The fish would die. Eventually, the dead fish would be consumed by birds and other animals. In turn, these animals would get sick and die. This would create an environmental disaster.

In the same way, when a lot of the fish in the ocean get sick and die, it creates a huge problem for all the other marine life. The fish are what we humans eat. Without them, there would be very little food for the other creatures that live in the ocean. It’s a terrible situation that could easily be avoided with just a little bit of common sense.


When sewage is not treated properly, it can cause all kinds of health problems. When it gets into our water supply, it causes all kinds of problems. When it gets into our food supply, it causes all kinds of problems. When it gets into our air supply, it causes all kinds of problems. Basically, when it gets into anywhere that it doesn’t belong, it causes all kinds of problems.

Marine sewage pollution is one of the worst types because it contains high levels of toxic chemicals. These chemicals include ammonia, hydrogen sulfide, and a variety of heavy metals. When these chemicals get into our water supply or our food supply, they can cause all kinds of health problems for people.

Industrial Waste

Industrial Waste

This is a very common type of waste found all over the country. It comes in many different shapes and sizes. The most common type of industrial waste is what is known as “blue” or “black” bagged trash. This type of waste consists of old or torn bags that have been filled with all kinds of stuff such as dirt, rocks, wood, glass, paper, and assorted other junk.

Another common type of industrial waste is metal scrap. This can include various types of tin, steel, and aluminum. It can also include various parts from machinery and equipment. All of this can be extremely hazardous to your pet if he happens to eat it. 

That’s why it’s important to make sure that you dispose of this kind of material properly. You should never allow your pet to ingest any of this type of material. Instead, you should take it to a hazardous waste disposal facility where it will be disposed of in a safe manner.

Carbon Dioxide pollution

Oceans cover 70% of the Earth’s surface, yet we know very little about what is going on below the surface. Recently, scientists have been taking core samples from the ocean floor and using those samples to create a picture of what is happening in the ocean over a long period of time. What they have discovered is that there has been a huge increase in carbon dioxide pollution in the oceans.

As the CO2 levels rise, so does the acidity of the water. This has a drastic effect on the marine life. It makes it hard for them to build their shells and skeletons and also makes it difficult for them to maintain healthy tissue. In extreme cases, this can lead to “sickly” shellfish and coral.

Plastic pollution

Plastic pollution

Did you know that the ocean is filled with plastic? It’s true. There are many different kinds of plastic. Some of it is useful like the kind that is used to make bottles and other containers. But, much of the plastic that ends up in the ocean is not useful at all.

When plastic breaks down, it is chemically altered by sunlight and becomes what is known as “microplastics”. These tiny pieces of plastic are extremely dangerous to marine life. When plastic gets into the stomachs of fish and other sea creatures, it causes them to literally eat themselves to death. This is called “entanglement”.

Marine animals that do not eat other marine animals, like turtles and birds, are especially vulnerable to this type of entanglement. Entangled animals often die a slow and horrible death. Their bodies become covered with sores and they rot from the inside out.

Light pollution

Scientists are finding that the light from our cities is having an adverse effect on sea life. Sea turtles, for example, use the light from the city as a guide to find their way back to the beach to lay their eggs. But, with all that artificial light, the turtles get confused and end up nesting far from the beach.

Sea otters are another species that has been affected by the light from the city. They used to live in colonies along the coast of California. But, because of all the light from the city, the otters are getting confused and they are separating themselves from each other. This is causing some otter colonies to almost disappear.

Chemical pollution

Chemical pollution

The chemical pollution in our oceans is destroying the marine life that depends on them for survival. The chemicals enter the ocean from various sources. Some of them come from human activities such as dumping of toxic chemicals into the water, runoff from agricultural operations, and even some types of commercial shipping. 

There are also naturally occurring chemicals that find their way into the ocean from volcanic eruptions, forest fires, and even from normal weather conditions.

Marine life is especially vulnerable to these pollutants because they are so small. Tiny fish are particularly affected by these pollutants. When a small fish is exposed to a certain level of a toxic chemical, it will stop feeding and eventually it will die. This lack of food will cause the fish to lose its natural instinct to swim in search of food. 

This condition is known as “behavioral changes”. When enough of these fish experience behavioral changes, the result is that there are fewer of them in the ocean. This causes a decline in the overall population of fish in the area.

Ocean Acidification

Ocean acidification is a process where the pH level of ocean water is becoming less alkaline (more acidic) over time. This is caused by the absorption of carbon dioxide from the atmosphere by the world’s oceans. When CO2 dissolves into water, it forms a weak carbonic acid which then reacts with the water to form bicarbonate and carbonate ions. 

These two ionic compounds are much more soluble in water than CO2, so they then dissolve into the water and carry more dissolved carbon away from the surface. This causes the pH level of the water to drop which then makes it more difficult for marine organisms to build their shells and skeletons.

This is having an adverse effect on marine life. It is believed that ocean acidification is one of the major causes of the decline of many species of marine life. Coral reefs are particularly vulnerable to ocean acidification. The tiny shellfish that live on coral reefs are the main food source for larger fish and other creatures that are essential to the reef’s ecosystem. When these shellfish are harmed or killed, the rest of the reef suffers too.



When too much algae grows in an area of water, it can cause the water to take on a greenish-brown or “sickly” appearance. This is called eutrophication. It happens when there are too many nutrients in the water. 

When this happens, the water becomes choked with plants that don’t need to be there. In time, the algae will decompose and the water will return to its normal color. However, during this process, the algae grow so thickly that they smother all the other life in the water.

This can have drastic consequences. For example, when too much algae blooms in the ocean, it causes the oxygen level in the water to decrease. This, in turn, causes a condition called anoxia. 

When the oxygen level in the water decreases to a certain point, the fish and other marine life that depend on oxygen for survival will start to die off. This is a very serious situation. It has been estimated that if the ocean is not healthy, it costs the global economy up to $330 billion per year!


Why is marine pollution a problem?

Marine pollution is a problem because it can have a negative effect on fish, seabirds, marine mammals, and people. Fish may be harmed by pollution in a few ways. The fish may eat or breathe something that is harmful or poisonous.

The fish may get sick from eating or drinking something toxic. Or, the fish may simply starve to death because they are unable to access the nutrients in the food they need to grow and reproduce. Marine pollution can also have a negative effect on birds and mammals in several different ways.

What is the main cause of marine pollution?

The main cause of marine pollution is usually the discharge of waste products into the sea. One example of this is sewage and raw sewage, which can contain a wide range of contaminants such as heavy metals, dioxins, persistent organic pollutants (POPs) and other toxins.

Another major source of marine pollution is fishing. This is because many fish are not removed from the catch of a commercial fishery until after the product has been sold.

How can we prevent marine pollution?

There are many ways in which we can prevent marine pollution. One of the most important ways is to become educated about the problem and what we can do to help prevent the pollution.

Another way is for every one of us to simply do our part by being responsible and using common sense. Marine pollution is caused by a number of different things. Some of it is caused by careless people who throw garbage into the ocean or dispose of it in ways that cause it to be dumped into the water.

How does marine pollution affect humans?

The most obvious effect is that it destroys the natural beauty of the ocean. If you’ve ever seen pictures of the ocean in the early days of the space program, when they were taking pictures of the earth from space, you’ll notice that the oceans are beautiful, clear, and clean.


Marine pollution is the amount of garbage that is dumped into the ocean by ships. This is one of the most serious problems that our planet is facing right now. Oceans cover 70% of the earth’s surface and almost everything that happens on land eventually ends up in the oceans. 

And now, even though we are trying hard to stop it, the amount of garbage in the oceans is increasing every day. Marine pollution has many different causes such as shipping, agriculture, municipal dumps, rural areas, etc. But, it is very important to remember that even the smallest amount of trash in the ocean will have an enormous impact on the health of marine life.