People Development & Environment Environmental Issues Pollution

శబ్దం ________ కంటే ఎక్కువగా ఉంటే శబ్ద కాలుష్యం ఏర్పడుతుంది.

1

80 - 100 dB

2

50 - 60 dB

3

70 - 75 dB

4

40 - 65 dB

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