Page from the Sustainability Report



Most of Terna's waste is recovered to be sent for production recycling. Only some residues are sent to the dump and therefore have an environmental impact. 81% of waste was recovered in 2012 (83% in 2011, 89% in 2010).

Like the resources used, waste is connected mainly with the modernisation and maintenance of the electricity infrastructure. These activities depend on technical considerations regarding the security and efficiency of the system. The quantity of waste may therefore change, even significantly, from year to year.



As regards materials, Terna does not use raw materials but electrical equipment, wires and other elements that are combined to be used in the transmission service. The table below provides an overview of the principal materials in supplies used by Terna. The weight is calculated starting from the quantity used, from the average or typical weight of the single elements and from the proportion of materials contained.

Environment: resource use and waste management


The production of a service does not normally require significant material inputs, and in the same way does not entail the treatment of significant quantities of waste. The case of the energy transmission service is no exception, as regards materials that enter into and exit from the production cycle of the service: the most significant consumption is of energy and this has already been dealt with in the paragraph “Energy consumption”.

Other atmospheric emissions


Other emissions with impacts on the atmosphere relating to coolant gases and nitrogen oxides are described below.

Coolant gases Some coolant gases have an effect on the environment because they damage the ozone layer or contribute to the greenhouse effect or because they have both these characteristics.

The table below shows the main types of gas present in Terna's equipment 


2012 2011 2010
R22 1,965 2,972 4,716
R407C 1,434 2,470 1,647
R410A 3,449 2,973 494
Other coolant gases (1) 828 686 210
(1) In 2012 the quantity of “Other coolant gases” was made up of 61% R134a gas, and 32% R422 gas.

Other indirect CO2 emissions


In addition to the emissions corresponding to the consumption of electricity, other indirect emissions caused by Terna’s activities are connected with:

  • grid losses;
  • flights taken by employees.

Grid losses 2012

Direct and indirect CO2 emissions


Greenhouse-gas emissions connected with Terna’s activities are caused by:

Energy consumption


The transmission of electricity only requires the direct consumption of energy for a few activities that support the service:

Energy efficiency and climate change


Terna's business iselectricity transmission and it has no production activities, which in the electricity industry – and for all businesses in general – are those most responsible for greenhouse gas emissions. For this reason, Terna is not subject to emission reduction obligations under the Kyoto targets, nor to emission trading schemes of any kind. In any case, Terna has chosen to voluntarily commit itself to limiting its emissions.

Sustainability objectives and results

In 2012 all areas of responsibility showed progress. The following table summarises the results obtained relative to the 2012 objectives stated in the previous Sustainability Report, referring to the pages of the Report which show, in greater detail, the various initiatives and results achieved.

Main works completed


In 2012, Terna increased its transformation capacity by about 10,500 MVA(1) of power and put more than 30 km of new High and Very High Voltage lines into operation.

The main works completed during 2012 were the following:

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