Geologic Timescale

It is important to complete projects within an agreed timescale because it guarantees that the project will get done on time. Having a timescale to complete a project also allows workers to plan how they will accomplish the goal.

Once you have it you always have it

Not in any important timescale.

Mineral resources are considered non-renewable because their production by earth forces on a geologic timescale cannot keep up with their consumption by humans on a human timescale.