Final answer:
Daniel Yergin discussed the importance of fossil fuels in our energy history and the need to transition away from them in the future. He mentioned that alternatives like solar and wind energy could be used until non-fossil fuels become economically feasible.
Step-by-step explanation:
In his book, Daniel Yergin discussed the importance of fossil fuels in our energy history and the need to transition away from them in the future. Yergin acknowledged that while there may not be superior substitutes for fossil fuels at the moment, alternatives like solar and wind energy could be good enough to meet our energy needs until non-fossil fuels become economically feasible. He highlighted the challenges and considerations involved in transitioning to these alternatives, such as the intermittent availability of energy and the need for sufficient storage.