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1.medium for plant growth;
2.foundation for building and civil structure;
3.raw material for industry;
4.sequestering carbon to mitigate climate change;
5.denaturing and filtering pollutants;
6.disposing of industrial and urban wastes;
7.being an archiv of human and planetary history;
8.being repository of germplasm and biodiversity;
9.maintaining and strengthing cycle of water and elements and moderating impacts of natural and anthropogenic perturbations on the environment;
10.maintaining aesthetic and cultural and artistic values of landscape and ecosystem and preserving cultural heritage.
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