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Category: Economy


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Graywater

Waste water produced in residences can be divided into two types. Black water, which has fecal secretions from toilets or

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Hunger

According to UN estimates, the number of people in the world suffering from malnutrition is approximately 880 million, slightly less

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  • צרו קשר
  • מאמרים לפי קטגוריה
  • הירשמו לניוזלטר