How much does it cost to breathe?

Nature provides us air for free. But what if one day it had enough of us freeloading parasites and started charging rent or demand we get a job and move out of this planet? How much would it cost for us to make air completely artificially with our current technology? According to NASA the average human uses 0. 84kg of oxygen per day. To electrolyze that from water takes 2. 8 kilowatt hours of electricity. With a world average electricity price of about 15 cents per kilowatt hour it costs about 42 cents per day of electricity. Factoring the costs of water and the maintenance cost of the oxygen electrolyzer system. It costs roughly 45 to 50 cents per day to breathe. So be thankful.