Chemical Engineering - Environmental Engineering - Discussion

Discussion Forum : Environmental Engineering - Section 2 (Q.No. 24)
24.
Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools).
1-2
5-10
15-20
25-30
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
1 comments Page 1 of 1.

Vishnu said:   7 years ago
Anyone explain this.

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