A. Toxic waste disposed of in rivers
B. The use of chemicals for fishing
C. Flaring of gas from refineries
D. A sound of 50 decibels in the air
Correct Answer:
Option D – A sound of 50 decibels in the air
A. Toxic waste disposed of in rivers
B. The use of chemicals for fishing
C. Flaring of gas from refineries
D. A sound of 50 decibels in the air
Correct Answer:
Option D – A sound of 50 decibels in the air
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