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cutting of trees for making furniture and for many other uses and clearing forests for making roads reduces natural habitats of animals,birds and innumerable plants.excess air pollution created by industries,export of animal skin and elephant tusks has greatly affected our biodiversity.

1) Unrestricted, intensive hunting, e.g., the American bison, passenger pigeon, timber wolf, fur seal.

2) Loss of habitat, e.g., Brazilian rain forest, Madagascar rain forest.

cultivar,3) Commercial production of GMO varieties that outperform non-GMO varieties which lead agriculture to become reliant on one brand/species of cultivar, to the exclusion of all others, e.g., Roundup Ready® sugar beets, some field corn varieties.

4) Introgressive Hybridization

5) Man's introduction into the biome of new, more prodigious, nonnative predators.

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