Respuesta :
Answer:
They inconsistent or unreliable as an energy source.
Explanation:
Most of non-renewable resources are non reliable, in that, their forming process takes a long period of time compared to their ussage which is short lived and dengerous to the environment.
An example of a non-renewable resourse are fossil fuels. They are inconsistent since, their supply keeps diminishing and can come to an end any time, with their slow forming, they become inconsistent.