Salutations!
What percentage of South Africa is exposed to unclean water?
90% of South Africa is exposed to unclean water, in the other hand, 10% of South Africa's water is hygienic and world class.
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A basic law of geochronology, stating that in any undisturbed sequence of rocks deposited in layers, youngest layer on top of older layer
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C they not caused by wind and Earth rotation
The air mass remains stable at roughly the same temperature and humidity,taking on all characteristics.They are only moved when high level winds take place
