Question: 7. The below table describes the lifecycle GHG emissions per unit of energy. We utilize 20 TW of energy globally. If we change 3%

7. The below table describes the lifecycle GHG emissions per unit of

7. The below table describes the lifecycle GHG emissions per unit of energy. We utilize 20 TW of energy globally. If we change 3% of this energy from Coal to the other energy sources, calculate the total amount of CO2 that is saved in 1 year by this transition. Fill the values in the table, showing your work below for two of the calculations. (2 x 5 points for work shown, 2 points each for remaining table entry) Energy Source Average Lifecycle GHG Emissions (gCO2/KWh) gCO2 saved by trading 1% of Coal Petroleum Natural Gas Biofuels Hydropower Nuclear Geothermal 1001 energy from this source to Coal X 840 469 18 16 45 Solar Wind 46 [for Si PVs, CdTe PVs ~18] 12 Source: IPCC Special Report on Renewable Energy Sources and Climate Change Mitigation

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