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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
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Ecological sanitation is a sustainable system for handling human excreta, using dry composting toilets. Such ‘Ecosave’ toilets are working in
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Correct option: C
Kerala and Sri Lanka
Option C (Kerala and Sri Lanka) is correct because ecological sanitation systems using dry composting toilets have been successfully implemented in Kerala, India, and Sri Lanka.
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A lake near a village suffered heavy mortality of fishes with in a few days. Consider the following reasons for this.
(i) Lost of urea and phosphate fertilizer were used in the crops in the vicinity
(ii) The area was sprayed with DDT by an aircraft
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(i) Lost of urea and phosphate fertilizer were used in the crops in the vicinity
(ii) The area was sprayed with DDT by an aircraft
(iii) The lake water turned green and stinky
(iv) Phytoplankton populations in the lake declined initially thereby greatly reducing photosynthesis. Which of the following is not used for disinfection of drinking water? World most problematic aquatic weed is