What can affect the energy supply?

The energy side can be affected by: Physical effects like where it is and limitations Technology which basically is new ways of extracting resources but the problem is some countries might not be able to catch on. Political effects like wars to gain the resource or to convert to non renewable which could challenge middle eastern and south american nations and finally, Cost of the resource as since they are running out, the price will go up. So high that countries could be stuck.