| Resolution on land claims and compliance with environmental regulations             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Brazil             | 
                                                                                                        2008             | 
                  
              
                                                                                                        | Retailer Sustainable Commerce Agreement             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        France             | 
                                                                                                        2008             | 
                  
              
                                                                                                        | Saving Energy in Data Centers             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        United States of America             | 
                                                                                                        2008             | 
                  
              
                                                                                                        | Shandong Province Village Renewable Energy Regulations             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        China             | 
                                                                                                        2008             | 
                  
              
                                                                                                        | Law No. 20,257 on Non-Conventional Renewable Energies             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Chile             | 
                                                                                                        2008             | 
                  
              
                                                                                                        | Mineral Oil Tax reduction on Biofuels and Natural Gas (Mineral Oil Tax Act) (amendment)             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Switzerland             | 
                                                                                                        2008             | 
                  
              
                                                                                                        | Plan for the Progressive Replacement of Electricity Meters (Smart Meters)             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Spain             | 
                                                                                                        2008             | 
                  
              
                                                                                                        | Act No. 5686 on Geothermal Resources And Mineral Waters             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Turkey             | 
                                                                                                        2007             | 
                  
              
                                                                                                        | Agricultural Chemicals Regulation Law             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Japan             | 
                                                                                                        2007             | 
                  
              
                                                                                                        | Alberta Specified Gas Emitters Regulation             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Canada             | 
                                                                                                        2007             | 
                  
              
                                                                                                        | Executive Order 13423: Strengthening Federal Environmental, Energy, and Transportation Management             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        United States of America             | 
                                                                                                        2007             | 
                  
              
                                                                                                        | Geothermal Business Activities (Government Regulation No. 59/07; 70/10)             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Indonesia             | 
                                                                                                        2007             | 
                  
              
                                                                                                        | Law Concerning the Promotion of Contracts Considering Reduction of Emissions of Greenhouse Gases and Others by the State and Other Entities (Environment Consideration Contract Law)             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Japan             | 
                                                                                                        2007             | 
                  
              
                                                                                                        | Livestock Manure Management and Regulations             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Republic of Korea             | 
                                                                                                        2007             | 
                  
              
                                                                                                        | National Energy Plan 2030 (PNE 2030)             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Brazil             | 
                                                                                                        2007             | 
                  
              
                                                                                                        | National Greenhouse and Energy Reporting Act             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Australia             | 
                                                                                                        2007             | 
                  
              
                                                                                                        | Presidential Decree on deforestation             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Brazil             | 
                                                                                                        2007             | 
                  
              
                                                                                                        | Queensland Smart Energy Policy             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        Australia             | 
                                                                                                        2007             | 
                  
              
                                                                                                        | Renewable and Energy efficiency Portfolio Standard -- Illinois             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        United States of America             | 
                                                                                                        2007             | 
                  
              
                                                                                                        | Retirement of Inefficient Plants             | 
                                                                                                        
             | 
                                                                                                        
             | 
                                                                                                        China             | 
                                                                                                        2007             |