3. Production cost Comparison with other base load technologies Jan 2002 Jan 2004 Jan 2006 Jan 2008 18.5 €/tCO2 22.5 €/tCO2 CO2 Range

4. Production mix and electricity cost Italy and France Production Mix 2007 ** Electricity price to Industrial Clients €/MWh *** * Autorità per l’energia elettrica e il gas, Commission de régulation de l’énergie ** Enel analysis based on anticipatory data from Enel, Eurostat, Terna, IEA data. 2007 *** Electricity price to industrial clients (24GWh/y) Electricity generation market * Italy France -52% 17% 11% 14% 5% 60% 9% 78% 4% 2% Italy France nuclear oil/others gas coal renewable

6. CO2 avoided emissions Nuclear contribution Portugal Source: Enel elaboration on data from IEA statistics, electricity information 2007 e WNA, Table of world nuclear power reactors, March 2008 Source: Enel analysis based on anticipatory data from Enel, Eurostat, Terna, IEA data. 2007 CO2 specific emissions (g/kWh) * - 84% In the EU Nuclear is the most prominent energy source without GHG emissions. Compared with the substitutive fossil source with the least GHG emission (CCGT), avoided emissions amount to nearly 410 Mton/year (10% European total) 197 reactors in operation 31% of produced electricity in Europe comes from nuclear 4 European countries produce more than 50% of their electricity with nuclear technology % nuclear Other sources Greece France 78% Ireland United Kingdom 19% Spain 26% Sweden 48% Finland 29% Netherlands 4% Germany 28% Russia 16% Norway Slovakia 56% Czech Rep. 30% Bulgaria 42% Romania 9% Slovenia Lithuania 72% Belgium 54% Ukraine 47% Switzerland 40% Austria Italy

7. Generation cost of low-CO2 technologies Nuclear * Source: Padua University - 2007