leakage out of total % greenhouse gas emissions kg 2,302 2,488 2, tonnes of CO 2 tonnes 61,992 66,799 77,361-4,808-7

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1 G4-EN18 Environment G4-EN15 G4-EN16 Quantities and Emissions (1) QUANTITY AND EMISSIONS Units % Amount of kg 588, , ,094 20, in operating equipment kg 543, , ,064 25, in cylinders kg 44,333 49,089 44,030-4, Percentage of leakage out of total % greenhouse gas emissions kg 2,302 2,488 2, TOTAL DIRECT AND INDIRECT GREENHOUSE GAS EMISSIONS (2) Units Leakage Refrigerant gas leaks (R22, R407C, R410A) Petrol for vehicles Diesel for vehicles Jet fuel for helicopters (3) Natural gas for heating Oil for heating and generators Total direct emissions Indirect emissions () Electricity % 54,102 58,478 69,831-4, ,731 5,959 6, ,992 66,799 77,361-4,808-7 of 74,716 70,326 66,324 4,390 6 CARBON INTENSITY EQUIVALENT TONNES OF / REVENUE (MILLION OF EURO) Units Total emissions (direct and indirect) compared to revenue / (million euro) % (1) In 2014, the impact from leakage included an event that occurred in a substation which resulted in the loss of kg of, equivalent to 26% of the total losses recorded. (2) The conversion of direct energy consumption and (sulphur hexafluoride) and refrigerant gas leaks to equivalent emissions is calculated this year using the parameters indicated in the IPCC Fifth Assessment Report (AR5) and Greenhouse Gas Protocol (GHG) Initiative. This led to a change in the equivalent of and refrigerant gas and total direct emissions compared to that which was previously published. Until 2014, data on refrigerant gas leaks was only collected for R22. Data collection for R407C and R410A began in 2015 (it is estimated that the percentage of coverage for the total data is equal to 85%). In 2015 there were no R22 leaks. Indirect consumption of electricity is converted taking into account the proportion of thermoelectric production in the total Italian electricity production for The reference for the division of the production mix is the Monthly Report on the Electricity System with the results for December 2015, available on the website (3) The Terna helicopter fleet has been operational since 2015.

2 Quantities and Emissions COOLANT GAS - QUANTITY AND EMISSIONS (1) Units % R22 quantity kg R22 leaks kg R407C quantity kg 2,846 2,677 3, R407C leaks kg R410A quantity kg 7,870 7,484 5, R410A leaks kg Other coolant gases quantity kg 1, , G4-EN17 G4-EN20 G4-EN21 G4-EN30 INDIRECT EMISSIONS OF RELATED TO STAFF AIR MILES (2) Units Type of flight Domestic International Intercontinental Total emissions % of of of ,379 1,297 1, QUANTITIES AND EMISSIONS OF MOTOR VEHICLES (3) Units % HYBRIDS no EURO 5 no. 1,213 1,405 1, EURO 4 no EURO 3 or lower no Total vehicles no. 1,323 1,514 1, Nitrogen oxide emissions (NO x ) (4) kg 8,260 8,980 9, (1) Until 2014, data on refrigerant gas leaks was only collected for R22. Data collection for R407C and R410A began in 2015 (it is estimated that the percentage of coverage for the total data is equal to 85%). (2) In order to evaluate deriving from the air travel of employees, the conversion factors indicated by the Greenhouse Gas Protocol Initiative have been used. (3) The table shows the vehicles in the Terna fleet which, in the period in question, filled up at least once as recorded on the fuel card. Only operating vehicles are considered. For information on the consumption of the company fleet, see the following fuel consumption tables. (4) The figure is calculated on the basis of the values provided by car manufacturers in logbooks and on the mileage estimates of said vehicles. The value expressed in the table represents 68.2% of the company fleet for 2015 (in 2014, it referred to 66.2% of the fleet and, in 2013, 62.7%).

3 G4-EN1 G4-EN2 G4-EN3 G4-EN8 Consumption DIRECT AND INDIRECT ENERGY CONSUMPTION BROKEN DOWN BY PRIMARY SOURCE Units % Petrol for vehicles (1) (2) Diesel for vehicles (1) 1,787 1,858 1, Jet fuel for helicopters (3) Natural gas for heating thousands of cubic metres Oil for generators and heating Electricity GWh DIRECT AND INDIRECT ENERGY CONSUMPTION BROKEN DOWN BY PRIMARY SOURCE GIGAJOULES Units % Petrol for vehicles (4) GJ Diesel for vehicles (5) GJ 77,431 80,514 85,238-3,083-4 Jet fuel for helicopters (6) GJ 7,031 7, Natural gas for heating GJ 8,184 10,022 8,659-1, Oil for generators and heating GJ 9,250 10,455 9,850-1, Total direct consumption GJ 102, , ,837-6,140-6 Electricity for powering substations and offices (7) GJ 702, , ,808 14,319 2 % WATER CONSUMPTION Units Water consumption per source m3 162, , ,692-8,991-5 % PAPER CONSUMPTION Units Certified paper (100% recycled) % MAIN MATERIALS IN SUPPLIES Units Porcelain Polymeric Copper 461 1,380 1, Aluminium 2,858 5,077 2,946-2, Steel 13,253 13,275 29, Glass 859 1,474 3, Dielectric oil % PCB CONCENTRATION Units PCB > 500ppm (8) ppm < PCB < 500ppm (1) Only the consumption of operating vehicles is considered. (2) The increase in petrol consumption is attributable to the increased utilisation of hybrid vehicles. (3) The Terna helicopter fleet has been operational since (4) Only the consumption of operating vehicles is considered. (5) The increase in petrol consumption is attributable to the increased utilisation of hybrid vehicles. (6) The Terna helicopter fleet has been operational since (7) The reference for the division of the production mix is the Monthly Report on the Electricity System with the results for December 2015, available on the website (8) The 2014 values are relative to the PCB concentration > 500ppm, which refer to appliances analysed during decommissioning.

4 Waste G4-EN23 WASTE MANAGEMENT (1) Units % Waste produced 4,942 5,112 4, Waste recovered % Non-hazardous special waste Machines, equipment, pylons, conductors, cables - quantity produced 2,527 1,339 1,042 1, quantity delivered for recycling 2,510 1,349 1,044 1, Packing - quantity produced quantity delivered for recycling Other - quantity produced quantity delivered for recycling Total non-hazardous special waste - quantity produced 3,099 2,205 1, quantity delivered for recycling 3,021 2,037 1, Hazardous special waste Machines, equipment, pylons, conductors, cables - quantity produced 1,044 1,957 1, quantity delivered for recycling 1,028 1,933 1, Oils - quantity produced quantity delivered for recycling Lead batteries - quantity produced quantity delivered for recycling Waste deriving from materials containing asbestos - quantity produced Other - quantity produced quantity delivered for recycling Total hazardous special waste - quantity produced 1,843 2,907 2,651-1, quantity delivered for recycling 1,561 2,643 2,136-1, (1) This includes only the special waste from the production process, not that produced by service activities (urban waste). This does not include waste relative to sewage and waste deriving from septic tanks, coming from substations not connected to the sewer network. The amount of sewage and septic tanks amounted to 789 in 2016, 680 in 2015 and 383 in In 2014, waste identified as Other emulsions (amounting to 857 ) produced during an accident that occurred in an operating area was also excluded.

5 G4-EN11 Biodiversity DISSUADERS FOR BIRDLIFE PRESENT ON THE NTG Units % Lines affected km Total number of dissuaders no. 14,472 13,866 13, LINES IN PROTECTED AREAS (1) Units % Lines interfering with protected areas km 5,512 5,541 5, Lines interfering as a total of lines managed by Terna % (1) The percentage of lines located in protected areas is calculated using the ATLARETE database, which may present non-significant misalignments with the data in the indicator tables showing the number of plants. G4-EN31 Costs for the Environment COSTS FOR THE ENVIRONMENT - INVEST- MENT AND OPERATING COSTS (1) Units % Environmental offsets /mln ,400 Environmental-impact studies /mln Environmental activities new plants /mln Environmental activities existing plants /mln Demolitions /mln Total investments /mln Costs Costs for environmental activities /mln Total operating expenses /mln (1) For details on the accounting method, see page 150.