The elimination of an organism in an ecosystem takes out all balance. There may be an overpopulation of some organisms, and an underpopulation of others. For an example, if rabbits were taken out of the food chain, there would be an overpopulation of grass, and underpopulation of what eats rabbits.
With a country as big as Russia, it is hard to give you an accurate estimation. Siberia is known for some of the coldest winters in the world, reaching a very dangerous -35 degrees Celsius. The north pole of cold has a record breaking -69 degree celsius winters. over 65% of Russia is covered by permafrost. There is a humid continental climate as well.
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Many oil rich nations in the middle east must import fresh water this is due to the reason that all the natural resources are not present in a particular region. Each region as different degree of natural resources . Hence places with oil mines have spares water resources and hence need to import water instead of oil.
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A rainforest is an area of tall, mostly evergreen trees and a high amount of rainfall. Rainforests are Earth's oldest living ecosystems, with some surviving in their present form for at least 70 million years.
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Africa is expected to continually increase its population
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