Some day gas and crude oil will be a thing of the past. With innovations here and there. In your own opinion what will replace gas and crude oil in the international market.
You should tell this to countries that have crude oil as their natural resources and they totally depend on it as a source of income generation. Crude oil exportation has made the leaders of my country to be lazy, they don't care about income generation from other sources. They don't care what happens when their crude oil is no longer needed. Ofcourse they have embezzled enough money to give them and their families good life in Europe and America.
Electricity will be the alternative to crude and gas, most things that are powered by refined crude oil and gas will be powered by electricity.