Answers

2015-09-12T20:42:10+05:30
1)soil is highly rich in microorganisms such as bacteria,fungi,protozoa,and otherĀ 
micro orthropods.
2)This is very much useful for growing crops.
3)Excess use of pesticides kills these bacteria.
4)Thus human actions are causing death of useful bacteria and fungi.
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2015-09-13T16:38:54+05:30
1) Excessive use of antibiotics also kill the useful bacteria in digestive system
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