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On an afternoon with moderate incoming solar radiation and an average wind speed of 2.5 m/s...

On an afternoon with moderate incoming solar radiation and an average wind speed of 2.5 m/s at a height of 10 m above the ground surface, a power plant emits sulfur dioxide at a rate of 1 kg/s. The effective height of stack is 130 m. The wind speed at the effective stack height is 2.8 m/s. Calculate the concentration (in μg/m3) of sulfur dioxide at ground elevation, directly 3 km downwind from the stack (show hand calculation for this problem). Assume urban conditions.

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