LIBROS DEL AUTOR: dr kaltoum belhassan

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  • POEMS TO SAVE WATER ON EARTH
    DR KALTOUM BELHASSAN
    Earth is covered 70 percent by water. The total amount of water in the world is approximately 1.4 billion km³, of which 97.5 percent is saltwater, occupying 1,351,000,000 km³. Freshwater lakes and rivers, ice and snow, and underground aquifers hold 2.5 percent of this water: 35 million km³ of freshwater on earth. Nearly 70 percent, or 24.34 million km³, of freshwater is in the ...
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