I have been able to imagine increasing an ERoEI* that is less than 1.0, indicating non-renewable, to a value greater than 1.0, indicating renewable, in only two ways: (1) increasing the efficiency of the collector by virtue of a technological breakthrough, (2) reduce the energy invested by virtue of a political or social change - principally getting rid of people who benefit by the enterprise but do not enhance the principal mission, namely, producing energy.
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