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IITick (✓) the true statements and cross (X) the false ones.1. A septic tank can be used to produce biogas.2. Sludge from sewage can be used to produce manure.3. If untreated wastewater is allowed to flow into lakes, it will heat the lake water.4. Chlorine gas kills microorganisms. |
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Answer» 2)FALSE 3)FALSE 4)TRUE |
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