A power plant releases a grey

smog plume that contains a high

concentration

of $SO2$ into the atmosphere around

$6am.$ As the sun warms the

atmosphere,

the movement of the plume in the

upward direction is restricted, and the

plume

moves downwards. The condition

results in elevated ground$-$level

concentrations of $SO2$ downwind

from the source.

$($i$)$ Using an illustration, predict the

type of plume produced.

$($ii$)$ Explain the factor that contributes

to the formation of this plume.

$(6$ marks$)$help