Question

what are the four principal biological system of the earth according to mr. lester brown?
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Answer 1

According to Mr. Lester R. Brown, there are four principal biological systems of the earth. These systems are fisheries, forests, grasslands, and croplands.

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Answer 2

Answer:

According to Mr. Lester R. Brown, there are four principal biological systems of the earth. These systems are fisheries, forests, grasslands, and croplands.