A. building tall factory chimneys
B. passing waste gases through filters and absorbers
C. using lead-free petrol in car
D. recycling tins, cans and bottles
Correct Answer: Option D
D. recycling tins, cans and bottles
A. building tall factory chimneys
B. passing waste gases through filters and absorbers
C. using lead-free petrol in car
D. recycling tins, cans and bottles
Correct Answer: Option D
D. recycling tins, cans and bottles
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