as DDT and PCBs are ubiquitous and carried far and wide. Bird extinctions were the first to hint at this, but in 2004, studies of declining butterflies and plants confirmed. A number of plants that are included in the lists of endangered species are valuable for the development of such spheres as health care, namely cancer investigations, and agriculture when it comes to the development of organic insecticides. Overall, the world community should take measures in order to improve the situation and prevent drastic consequences for the humanity. Furthermore, amphibians at this time are on a huge decline attributable to habitat loss and that includes frog and lizards, there are about 427 species of amphibians at present listed as threatened of extinction (Stuart). Introduced species prey on them, eat their food, infect them or otherwise disrupt them. Red and Black Data Books are invented, but the life of a great variety of species is still endangered or ended entirely. The beast and the fish can not resist against them, thats why many species are ready to disappear, and some have already died off. Marine reserves only cover 1 of oceans, and more are needed.
The reason for this disaster is people, or rather their business activity. Humans began to destroy ecosystems in a major way about 10,000 years ago with the development of agriculture. Now in Africa, herds of Zebra are very numerous, and one of the most interesting - Zebra-Quagga was exterminated completely. An example of such symbols is elephant ivory that has caused a real epidemic in terms of poaching. Then the men realized that the woodpecker is show more content, in addition, if the larger mammals become extinct, like the tigers or bears then the animals that feed off them will die off and become extinct. The main question to be answered in the following animal extinction essay is whether there exist any environmental benefits in relation to species preservation. However, the destroyed balance in the diversity of biological species means that some animals are endangered and therefore need to be preserved. Such examples are many. Poachers were not in favor at all times. Did you like the essay? For example, in Africa the mass extermination of animals began in the xviii century, when the Dutch who inhabited the southern part of the continent, began to move north.
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