If corporations start charging us for air, how would they measure it and how much would it cost?

Many gas stations charge for "air" now.  You pay a certain amount for all the air you can put into your tires in an allotted time and then the machine turns off.  Corporations can charge whatever customers are willing to pay.

They would install a meter on your nose and charge by the cubic yard. You could offset the cost by charging them storage for the space their air is occupying on your property.

I'm talking about air in the atmosphere, that we breath. 

oh!