Answers

2015-06-12T12:06:23+05:30
The three factors are as follows :

1)Due to presence of harmful chemicals.
2)Due to lack of nutrients.
3)presence of harmful chemicals.
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  • Brainly User
2015-06-12T12:10:15+05:30
1.) Lack of nutrients. 2.) Dry environmental conditions. 3.) Presence of harmful chemicals 
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