I recently read, and recommend a book titled "Here Comes the Sun" by Bill McKibben.
There's a passage where a calculation is made of the amount of minerals that have to be mined in order to build renewable energy to cover all current energy needs.
This quantity is huge. However it is equivalent in mass to the amount of fossil fuels that are extracted every year.
The major difference is that the equipment for renewable energy will last decades whereas the fossil fuels are burned and need to be dug up constantly, for ever.