They wouldn't eat garbage if it wasn't for environmental pollution.

Marine pollution usually means that human beings have changed the original state of the ocean and destroyed the marine ecosystem. The pollution caused by harmful substances entering the marine environment will damage biological resources, endanger human health, hinder fishing and other human activities at sea, and damage the quality of seawater and the environment. The ocean has been the most stable ecosystem on earth for a long time because of its vast area and huge water storage. All kinds of substances that flow from land into the sea are accepted by the ocean, but the ocean itself has not changed significantly. However, in recent decades, with the development of world industry, marine pollution has become increasingly serious, so that the local sea environment has undergone great changes, and there is a tendency to continue to expand.

On South Georgia Island in the southern Atlantic Ocean, the population of albatrosses has been declining over the past four decades, in part because of plastic fishing gear and other rubbish discarded by humans.

An albatross chick died after eating a plastic toothpick that punctured its intestines. This is another example of the catastrophic damage caused by plastic waste to the ocean.

In the final episode of the BBC documentary Blue Planet 2, viewers saw a sperm whale mistaking a blue plastic bucket for food.

The plastic bucket just got stuck in the mouth of the sperm whale and was not swallowed. Sir David Attenborough said in the narrator: "for all life in the ocean, the problems of industrial pollutants and plastic waste must be solved."

About 17 million Britons watch BBC's Blue Planet 2 documentary every week, and increased environmental awareness may help the government pay attention to serious plastic pollution. In the film, the researchers show the astonishing amount of plastic waste in the world's oceans.

Sir David Attenborough, host of Blue Planet 2, took a walk on the beach and picked up a lot of plastic garbage to highlight to the audience the seriousness of the problem of plastic pollution in the ocean.

A sea turtle appeared next to a plastic bag floating on the sea. Plastic waste is one of the biggest threats to marine animals. Plastic bags are just the tip of the iceberg of marine plastic pollution, with tens of millions of tons of plastic litter entering the ocean each year, killing thousands of cetaceans and dolphins, the researchers said. There are reports that the growing pollution problem could lead to the disappearance of Britain's only orcas in a short period of time.

The researchers found that seabirds swallow plastic food bags more often than other plastic trash. Lightweight plastic products can float far away with ocean currents, and large amounts of abandoned fishing nets and other plastic waste have been found in some large marine protected areas far from the fishing industry. This has become a global problem.

This is a desperate scene. Plastic waste has threatened the lives of many large marine animals. Cetaceans are sometimes entangled by fishing nets or lines discarded by fishing boats, unable to return to the surface to breathe and eventually suffocate to death.