Re the freon ban on older cars...

what happens to the CFC gas when u have it replaced at the car aircon shop?

Where does the aircon shop dump the ozone-depleting CFC?

Do they just release it into the air?

Or do they store it in an air tank, process it and dispose of it in an ozone-friendly manner?

If they just release the CFC freon into the air, doesnt it defeat the purpose of protecting the ozone layer?