There is no such thing as "feon".
As long as the appliance is stored up right, it can be stored for years. The chemical cooling agent will still be good. Your appliance may be out dated before the feon is.
They can, but they can't use firearms.
Antarctica should last as long as the earth lasts.
Should last about 30 minutez
It should last five to six minutes.
A properly configured sealed terrarium should last indefinitely.
as long as you can keep it
How ever long you want it to last.
As long as I say it does!
They should last 100,000 miles.
How long your tires last depends on how you use them and where you drive with them however they should be able to last as long as comparable new tires.