The following table shows the estimates of the world subsidies on different energy types in 2007. a. Fill in the blanks. b. Rank the energy types in a descending order) based on their shares of the total subsidies. c. Rank the energy types in a descending order) based on their subsidies per energy unit. Energy type Subsidy estimates (US $billion/year) Energy produced Subsidies per energy unit (US cents/kWh) Nuclear energy 45 2.72 TWh (blank) Renewable Energy (blank) 534 GWh 5 Biofuels 20 34 Mtoe (blank) Fossil Fuels 400 Mtoe 0.8 Source: preliminary estimates based on GSI (2010). Unit conversions information 1 toe (tone oil equivalent) = 39.68 MBTU (million British thermal unit) 1 kWh = 3412 BTU Tera=1012, Giga=109, Mega= 106 The following table shows the estimates of the world subsidies on different energy types in 2007. a. Fill in the blanks. b. Rank the energy types in a descending order) based on their shares of the total subsidies. c. Rank the energy types in a descending order) based on their subsidies per energy unit. Energy type Subsidy estimates (US $billion/year) Energy produced Subsidies per energy unit (US cents/kWh) Nuclear energy 45 2.72 TWh (blank) Renewable Energy (blank) 534 GWh 5 Biofuels 20 34 Mtoe (blank) Fossil Fuels 400 Mtoe 0.8 Source: preliminary estimates based on GSI (2010). Unit conversions information 1 toe (tone oil equivalent) = 39.68 MBTU (million British thermal unit) 1 kWh = 3412 BTU Tera=1012, Giga=109, Mega= 106