Why are so many animals in danger?

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It is estimated that there could be as many as 14 million species of plants and animals in the world, although only around two million have been officially recorded so far. More than 12,000 species of animals and plants now face extinction, due largely to human activities. Some will die out before they have even been discovered.

Tropical rainforests are the world’s richest natural habitats, housing more than two-thirds of all plant and animal species on earth. Sadly, the r...