In science, there are many ways of biological extinction, such as environmental change, biological struggle, food chain rupture and so on. Will lead to the extinction of a certain creature. However, in addition to these, there is another compound that may lead to the extinction of some organisms, and that is the compound produced by human beings. According to the research of Aarhus University, polychlorinated biphenyls (PCBs) pollution may destroy killer whales. Is killer whales really a kind of killer whales? Eliminate? The behavior of killer whales? Sea overlord? It is also the natural enemy of dolphins, penguins and other creatures. Once it disappears, it will definitely affect the development of all creatures in its food chain.

In fact, PCB pollution has been banned and advocated by the scientific community for more than 40 years. However, the influence of this chemical has not disappeared, and it still poses a fatal threat to the creatures at the top of the food chain. New research by scientists shows that according to the data, half of the killer whales in the world may disappear from the most polluted areas within 30 to 50 years, that is, within the shortest 30 years, which may directly lead to the extinction of killer whales in some areas.

Science? The magazine has warned that orca, as the last link in the food chain, will converge on itself indirectly after capturing other creatures. Through the study, we can also see that killer whales are also the mammals with the highest PCBs content in their tissues. According to scientific research, the adipose tissue (blubber) of killer whales contains as much as 1300 mg per kilogram. Therefore, the high content of killer whales not only threatens their own lives, but also may lead to infertility and seriously affect the immune system.

By observing the population of 19 killer whales, the research team of Aarhus University found that their numbers declined rapidly, and concluded that the species may disappear completely in several areas. The areas where killer whales are seriously polluted are mainly distributed in the waters near Brazil, the Strait of Gibraltar and all parts of Britain. According to preliminary estimates, the number of killer whales left in these areas is less than 10. Also on the east coast of Greenland, because seals are affected, killer whales are natural enemies of seals, so they will still be affected. This is how the food chain is connected. One person will be affected, and others will be affected.

According to scientific practice, more than 90 countries around the world have promised to eliminate and treat a large number of PCBs. According to the updated data, about 350 killer whales in the world have PCB content information, so they are still in production and use, and there is no 100% control. It seems normal that more than 50% killer whales are threatened. Under normal circumstances, female killer whales may live for 60-70 years, and they are affected for nearly 50 years, so the number of killer whales will inevitably decrease.

The elimination of PCB pollution is inevitable, but human beings have not done it completely on earth, which seems to be another harmful substance that affects our biological survival. Therefore, in the future, mankind should implement more agreements on environmental protection. The earth needs a stable ecological environment and a stable food chain, so that there will be a better living environment for human beings, otherwise perhaps the end of biology will have a great impact on human beings. At that time, it may be too late to protect the earth from ourselves. Thank you for reading!