The environmental movement has rightfully shown concern about the South American rainforest. While it is true that the entire rainforest system is a delicately balanced harmony of thousands of subsystems, it is generally believed that it has taken millions of years to evolve. After all, each living thing forms part of the environment for other living things so that adaptation is a dynamic process seemingly taking much longer than might be imagined. This is why the rainforest is spoken of as being a fragile ecosystem.

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