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