Answer:
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
The buyer doesn’t want it, the producer doesn’t need it and the user doesn’t know their using it.
Meat that has been cured by being cut into long, thin strips and dried
You'll have to consult an optometrist if you want to improve this.
What goes up but never comes down?
What language does a billboard speak?