Answers

2014-10-11T19:26:57+05:30
acetic acid whose common name is vinegar is used as a preservative.

fertilizers help in the proper growth of crops.

excess fertilizers can effect the fertility of soil.

excess intake of acetic acid can harm us.
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2014-10-11T19:46:38+05:30
ADVANTAGES :
1)chemicals are used in preservation of different food items, so that they remain fresh for long period of time 
2)chemicals are used in medicines which we use whenever we are ill to get well.
DISADVANTAGES :
 1)Use of DDT, CFCs can lead to hormone replacement therapy.
2) Moreover, use of chemical fertilisers can contaminate water bodies which cause severe health issues.


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