Analysis of Bohai Sea environmental pollution and ecological damage /question/15572692.html 1. Destruction of the environment: Since the environment is one of the components of the ecosystem, its changes will affect the stability of the ecosystem. There are many examples of environmental damage that breaks the balance of the ecological environment, such as: the formation of eutrophication in lakes and swamps; the mercury poisoning incident in Japan; fluoride destroying the ozone layer; the deterioration of the ecological environment of the Aswan Dam; after the application of "666" and "DDT" The negative consequences; the "wet chamber effect" on the earth, etc. 2. Destruction of vegetation. Vegetation, mainly forest, is the lever for terrestrial ecological balance. The destruction of vegetation has caused the most ecological disasters on the earth. For example, the black storm that occurred in the western United States in 1934 destroyed more than 45 million acres of cultivated land; in 1963, The great storm that occurred in the agricultural reclamation areas of the former Soviet Union destroyed more than 300 million acres of farmland; the ancient Babylonian civilization also perished due to the destruction of forests; the Thar Plain between India and Pakistan was reduced to a desert due to forest destruction. Covering an area of ??650,000 square kilometers; the deterioration of ecological conditions in the Yellow River Basin in China is due to the destruction of forest vegetation in the upper reaches. Today, the Yangtze River will become the second Yellow River; the deterioration of ecological conditions in the northeastern forest areas is mainly due to the destruction of forest vegetation in the southwest and unreasonable logging and over-harvesting of forests in the Northeast forest region. 3. Destruction of the food chain: Examples of destruction of the food chain and ecological balance include: excessive hunting of natural enemies of pests caused forest diseases and insect pests; India once hunted a large number of otters, which increased diseased fish and reduced fish production; Australia, which has a developed animal husbandry, became a problem due to cow dung covering the grassland. The example of dung beetles rescued by disasters is even more recent. Of course, several inducements often coexist in the biosphere.