Because it takes millions of years to create minerals. The industrial revolution is only a couple of hundred years old - yet we're exhausting minerals at an alarming rate !
Uranium can be exhausted by using this metal as a nuclear fuel.But we are still far from it.
i guess the question should be why instead of where.
Most minerals are created on geologic time scales of millions of years. The massive mining techniques and the huge consumption and demand for products created from minerals has only occurred in the last several centuries.
by sun, human activities, global warming (indiectly) over heating etc.................
Whenever a natural resource appears to be 'exhausted', excavation ceases. However, in future times, technology can improve or the prices of the natural resource increase so that mining is profitable again.
Whenever a natural resource appears to be 'exhausted', excavation ceases. However, in future times, technology can improve or the prices of the natural resource increase so that mining is profitable again.
i am exhausted
There could be several reasons why you have been so exhausted. It could be that you are just not getting enough sleep, or it could be that you are under a lot of stress. If the exhaustion continues, it is best to see a doctor to find the cause.
in the sentence "joe is exhausted" exhausted is a pronoun, describes "joe" the noun in the sentence "joe exhausted all of his options" exhausted is a verb, describing what the noun is doing or has done depends on how the word is being used
I've exhausted my nest egg.
As I climbed the hill I was exhausted and had a rest.
It means you are not getting enough nourishment. Not just energy but vitamins and minerals.