Question

although nuclear energy is not based on fossil fuels, why is it considered a nonrenewable energy source?
it is dependent on a limited, mined mineral.
it takes hundreds to thousands of years to break down its by - products.
it is not a process that occurs naturally on the planet.
it can only be used for brief periods of time without causing environmental damage.

Explanation:

Nuclear energy relies on uranium, a mined mineral that is in limited supply. Once depleted, it cannot be replenished quickly. The long - term breakdown of by - products is not the main reason for it being non - renewable, nor is the natural occurrence or short - term environmental impact.

Answer:

It is dependent on a limited, mined mineral.