Energy Security and Green Energy are dependent on Raw Material Supply. A solar PV plant requires 40 times more Copper to produce the same equivalent energy as a coal power plant (Raw materials : a barrier for new energy technologies? - YouTube ). Presently almost all of the materials are now source from outside the EU.
This video gives a brief insight to the problem and also speaks of the opportunities. As it stands, this new field presents a vast opportunity for innovation and entrepreneurship on our way to a clean and sustainable future.