INTRODUCTION:
EEI is an index of sustainability based on fossil fuel energy consumption (FFEC) per unit of consumption expenditure (HWE). The index measures the consumption of energy generated from fossil fuel sources like coal, petroleum and natural gas which are non-renewable and release CO2 into the atmosphere. Note that by basing the measure of fuel efficiency on HWE rather than GDP, which is commonly used, we assess the extent to which energy is being efficiently utilized for the ultimate benefit of human beings, not merely for production and growth for their own sake. In calculating EEI, we take into account the long gestation period and long life span of investments in renewable energy and energy efficiency. For the purpose of this study, we have used a period of 10 years.

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