Write about the earth's principal biological system. What are they
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Mr. Lester R. Brown has pointed out that there are four principal biological systems of the earth. They are fisheries, forests, grasslands and croplands. ... Similarly, grasslands and woodlands are being converted into deserts and wastelands.
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The Green Movement aims at creating a holistic and ecological view of the world. It makes people conscious of stopping further degradation and deterioration of nature and its resources. It started in 1972. The world's first nationwide Green Party was founded in New Zealand.
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