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Which are the earth\'s principal biological system?what is their current ecological status? |
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Answer» The earth\'s four biological systems are fisheries, grasslands,oceans and forests. In protein conscious and protein hunger world, fishes are consumed as protein supply. The forests are cut down for firewood, agriculture,industrial requirements. The\xa0earth\'s\xa0four principal\xa0biological systems\xa0namely, fisheries, forests, grasslands and croplands are the foundation of the global economic\xa0system. In addition to supplying food, these\xa0systems\xa0provide virtually all the raw materials for industry except minerals and petroleum-derived synthetics. |
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