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The top documents tagged [years fossil fuels]
ENERGY AND ENERGY SYSTEMS OF THE FUTURE : Keynote address at ICCES14 at M E A College of Engg 8th Aug
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Alternative Energy Sources
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SHORT VERSION: A New Green Economy
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Average Composition of the Troposphere Gas Name Formula Abundance (%) Residence time (approx) Nitrogen N 2 78.08%42,000,000 years Oxygen O 2 20.95%5,000
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Module-2
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