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NEET UG BIOLOGY MCQ: ENVIRONMENTAL ISSUES
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The gradual continuous increase in average temperature of surface of the earth as a result of increase in concentration of and CFCs is termed as
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Correct option: A
Global warming
Option A (Global warming) is correct because the gradual increase in Earth's average temperature due to increased and CFCs is defined as global warming.
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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