Continuous SO2 is released from the 80 m high chimney of an industrial facility to the atmosphere with an emission flow of 400 g/s. Cloud elevation is about 15 m. Average wind speed was measured as 2.5 m/s. How many g/m is the steady-state SO2 concentration expected to be at a distance of 1.2 km from the chimney, in the direction of the wind and at 2 m from the ground, in open air at night, ignoring the chemical reactions