For my choice of what kind of resource should be developed I would pick Biomass. We have been using this kind of energy long before the use of fossil fuels, in the past people used wood from the forest to build their homes and even to cook.
We define biomass as the energy from organic matter. The Earth is full of this natural and renewable resource of energy. If we learn how to develop this kind of energy, in a future not too far, we can substitute the use of fossil fuels with the use of biomass as a source of energy, but firs we have to learn how to explode correctly the use of any biomass such as wood from the trees, plants, residues from agriculture or forestry, and the organic component municipal and industrial waste.
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