For the sake of simplicity, I have been looking at the state of conventional oil. But what of unconventional oil (whatever that is)? Or gas and coal, or nuclear, or renewable fuels such as wind and solar? You may have heard that hydrogen is the answer for the internal combustion engines. Unfortunately, all of these sources have problems which prevent them being the panacea we need. Some are running out like oil, others are unsuitable, and some are not usable within the period that we are looking at. They are all important aids in the effort to avoid disaster but aids only. I shall look at each and explain
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