The dispersion of pollutants in atmosphere is maximum when

Q. The dispersion of pollutants in atmosphere is maximum when

1. Environmental lapse rate is greater than adiabatic lapse rate
2. Environmental lapse rate is less than adiabatic lapse rate
3. Environmental lapse rate is equal to adiabatic lapse rate
4. Maximum mixing depth is equal to zero

Answer: Environmental lapse rate is greater than adiabatic lapse rate