Has the sixth mass extinction begun?

Sort of, our country's Yangtze River white sturgeon has become extinct, we can no longer see it in the water, and the white stork, Chinese rhinoceros, these are basically no way to see again, human activities are the main reason for their disappearance, human overexploitation of their living environment, theft and trade, so that they have no way to survive.

Due to the influence of human industrialization, the earth's environment has been seriously damaged, the temperature has risen, the glaciers have melted, the blue sky and white clouds of the past have disappeared, replaced by foggy skies, the freshwater resources that human beings are lazy to survive are also decreasing sharply, and the species on the earth have died out one after another. According to scientists, about 25% of the more than 27,600 species on the planet have disappeared, and nearly 50% of the species that have been found to live with humans have disappeared, and the sixth mass extinction has quietly begun.

Many scientists believe that the sixth mass extinction has begun, and in this grim situation, we should protect the creatures and coexist peacefully with them.

The mass extinction is not something sensational, and the most familiar mass extinction we are probably with is the last dinosaur. There have been five mass extinctions in total, and there are phenomena that suggest that we may have entered the sixth mass extinction period.

These mass extinctions are the Ordovician mass extinction 100 million years ago, when more than 85% of species disappeared; The Devonian mass extinction 100 million years ago, this time mainly occurred in the ocean; The third mass extinction was at the end of the Permian period hundreds of millions of years ago; The fourth mass extinction occurred at the end of the Triassic period 200 million years ago, when a large number of reptiles were devastated, and the dinosaur family also took the opportunity to "ascend to the top"; The fifth time was 65 million years ago, an asteroid with a diameter of 10 kilometers hit the Yucatan Peninsula in present-day North America in Mexico at high speed, which led to the extinction of many species on Earth, the most representative of which is the dinosaur family. The sixth extinction is the time period we are in, some think.

Judging from the time interval of the five mass extinctions,Every 100 million years, there will be a biological extinction event, and 65 million years have passed since the extinction of the dinosaurs, so will there be a new round of extinction on the earth, that is, the sixth mass extinction event?

There is data to show thatOver the past 200 million years, an average of 90 vertebrate species have gone extinct every 100 years, and an average of one higher plant has gone extinct every 27 years。However, the interference of human beings makes the worldBirdswithThe rate of extinction of mammals has increased by a factor of 100-1,000。Since 1600, 724 species of higher animals and plants have been recorded extinct, and the vast majority of species have become extinct before humans knew it.

Rough estimates show that in 400 years, the area of living organisms has shrunk by 90 per cent and the number of species has been halved, with the impact of species loss being more pronounced by the deforestation of tropical rainforests. It is estimated that species extinctions caused by deforestation in the world from 1990 to 2020 will reduce the number of species in the world by 5%-15%, or 50-150 per day. InThe last 400 years, the whole world is extinctMammals58 species, about one species becomes extinct every seven years, which is faster than the normal fossil record7-70 times higher；In100 years of the twentieth century, the whole world is extinctMammals23 species, about one species becomes extinct every four years, which is faster than the normal fossil record13-135 times higher

This pile of data shows that the rate of extinction has indeed accelerated, and some experts support the theory of a sixth extinction. In any case, species extinction is accelerating, and this has a lot to do with human activity. It's still the same sentence,Protecting the environment is everyone's responsibility