It depends on the kind of area you are talking about... but for a test I'd say Homogeneous meaning it is the same throughout.
Sorry, more to the point, eventually air will come to be homogeneous unless you have something that is not mixing like a level of smog or a rain cloud.
*For a test I'd still say Homogeneous, but it is a terrible question. Usually teachers tell you in their lectures or it is in your book, the answer that they want.
They can be either one. For instance, ozone is a gas and is there homogeneous, but soot particles are suspended solids (aerosols) and are therefore heterogeneous.
No air is not a homogeneous mixture, air is a heterogeneous mixture.
Homogeneous.
It is Homogeneous
Heterogeneous
pure air is homogeneous but dusty air is heterogeneous
Pure air is homogeneous because all components are completely miscible.
heterogeneous
homogeneous
air is homogeneous
Air is a homogeneous mixture.
Air is homogeneous mixture of gases.
Air is a homogeneous mixture.
Air is a homogeneous mixture.
homogeneous
homogeneous
Airt is a homogeneous mixture.