One day we will run out of oil, it is not today or tomorrow, but one day we will run out of oil and we have to leave oil before oil leaves us, and we have to prepare ourselves for that day.

The earlier we start, the better, because all of our economic and social system is based on oil so to change from that will take a lot of time and a lot of money and we should take this issue very seriously.

— Dr Fatih Birol, Chief Economist of the International Energy Agency

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