As chemical fertilizers, manure, sewage, etc. are discharged into the sea, sufficient nutrients are provided for some algae to stimulate the crazy growth of these seaweeds, and air pollution factors have led to the formation of some ”low oxygen zones” and ”anoxic zones” in the sea.SinoeastDeutsch Fish, shrimp, and shellfish cannot survive under hypoxia, and even seaweeds are difficult to survive. Therefore, the “low oxygen zone” and “anoxic zone” are also called “dead zones.”
According to the report, the number and area of ”dead zones” have been expanding since the 1970s. In 1994, there were an estimated 149 ”dead zones” in the global ocean, but there may have been as many as 200 ”dead zones” in 2006. The earliest discovered and recorded “dead zone” was on the Atlantic coast of the northeastern United States, the Baltic Sea, the Katigart Bay, the Black Sea, and the northeastern part of the Adriatic. The most famous “dead zone” in the Gulf of Mexico is caused by nutrients drained by the Mississippi River. Some of the latest death zones have appeared in the coastal areas of South America, China, Japan, Southeastern Australia and New Zealand. The ”dead zone” of the ocean poses a great threat to the fishery, but if the wind can wash away the nutritious water, the ”dead zone” may be resurrected. UNEP called on coastal countries to take measures to control land-based pollution and curb the continued increase in ”dead zones”.العربيةSinoeast
Human destroyed the earth, and the speed of it is unprecedented
Nowadays, the destruction of the earth has reached an unprecedented rate of speed. The Millennium Ecosystem Assessment agency believes that this will make nature more likely to be mutated, leading to disease spread, forest destruction,Sinoeast日本語 and a “dead zone” in the ocean.
The 1360 professors of Millennium Ecosystem Assessment came out a result together through the survey of 95 countries – from the past 50 years, the increase of population make the two thirds ecosystem, including air and water, polluted and over developed. This report indicated: Human’s activities has brought huge pressure to the natural regulation of the earth, and the ecosystem of the earth may not foster people who born in the future.
The report also indicated that ”10%-30% mammals, birds and amphibians are on the edge of extinction. This largest scale work of the search of ecosystem found that, in the past 50 years, the destroyed speed of people for acquiring food, water, wood, fiber and bunkers, is quicker than every past age, the scale of destroying is wider than every past age, this make the diversity of organism bear a big loss that cannot be twisted.” The report adds that from 1945 to the present,SinoeastGalego human beings have cultivated more land than cultivated land in the 18th and 19th centuries. The report said: “In the next 50 years, surface erosion will bring more and more serious consequences.” The average temperature in Antarctica is minus 25°C, the average temperature in the inland plateau is about 52°C, and the extreme minimum temperature has reached minus 89.2°C, making it the coldest land in the world.