The new car design I came up with after seeing the Tesla Roadster

It is the "Air Car."
What is the most abundant resource on Earth that never runs out no matter how much you use it?
Yes, it is air.
If you fill a balloon with air and let it go, it flies very fast.
Using this principle, you would inject a massive amount of air into a car and drive by discharging it.
And while driving, you would automatically recharge the air by using the headwind..
So to speak, it is perpetual motion.
No environmental pollution and it's free.
Could there be a better car than this?