Pretty simple analysis: sunk cost vs variable cost. One can stretch and recoupe to make as an investment, sunk cost. The other is a variable cost type investment that depends on many variables which makes it more costly in the long run. Solar is not 'the' solution but it is part of the solution. Solar still has along ways to go and technology improvements will make it more efficient and reliable in the future. Until then oil is the main solution but its erratic and volatile nature will continue to push this nation to innovate products (that use oil more efficiently or find an alternative) or produce more for ourselves.
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one solution for stablizing oil would be to treat it as a utility and regulate it as such.we need to control our natural resources as a nation which would make us independent of the destabilization from world events.the lack of oil is not the issue as much as the lack of maintaining control of our own oil.