multiracial volunteers group hands stack together while dredging water hyacinth the river |
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navigate by keyword : working people volunteer kill swamp spread diverse wet eichhornia lake canal leaf plant background cover outdoor earth day weed summer park improve develop african mountain sky destroy conservation environmental together hands stack multiracial group tropical floating community surface waste problem pollution asian thailand dredging river aquatic green nature water environment hyacinth volunteers concept restricts flow starves oxygen |
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multiracial volunteers group hands stack together while dredging water hyacinth in the river, concept of environmental conservation because water hyacinth is restricts water flow, starves water oxygen |
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