Look at the picture “Pollution Identification.” Based on the picture, what are the sources of air pollution shown by numbers 1, 2, and 3 in order?, Smoke from burning trash, cigarette smoke, and road dust., Car exhaust fumes, satay/BBQ fumes, and factory chimney fumes., Noise pollution from car horns, water pollution in gutters, and soil pollution., Oxygen from trees, a gentle breeze, and steam from hot water..

CHAPTER 3

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