Respostas
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Resposta:
(o certo é what are the sources of water, gramaticalmente)
Water sources can be, lakes, and some other places as long as the water gets purified after.
97% of the water on the Earth is salt water and only three percent is fresh water; slightly over two thirds of this is frozen in glaciers and polar ice caps.
Explicação:
tbm tem na wiki
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