Answer:
Longer than a decade and shorter than a milennium
The buyer doesn’t want it, the producer doesn’t need it and the user doesn’t know their using it.
One am I, among six others: Largest, smallest, cold, dark and two brothers
Besides Paris, what is the capital of France?
This is a plant named after a light source. What is it?
People take me on walks and I run and have fun. What am I?