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.

In accordance with the provisions of current legislation (Regulation EC No. 1005/2009 of the European Parliament and Council) the quantity of R22 gas used in the equipment has been declining constantly.

In fact - in the event of dispersion - only R22 gas has harmful effects both on the ozone layer and as regards the greenhouse effect. The other types of gas present have no effect on the ozone, and only contribute to the greenhouse effect.

In 212 there were no new purchases of R22 gas, but some quantity of gas was dispersed following the malfunctioning of some conditioning systems which are being replaced.

Unlike previous years, the table below shows only the quantity relating to actual leaks and no longer consumption.


2012 2011 2010
R22 61 14 133

Nitrogen oxides The activities performed by Terna do not include combustion processes and therefore do not entail significant nitrogen oxide (NOx) emissions. In 2012, however, we began monitoring NOx emissions associated with consumption by corporate operating vehicles.


NOx 4,920

The figure is calculated on the basis of the data provided by car manufacturers in registration documents and estimates of vehicle mileage. The figure shown in the table represents 59% of corporate operating vehicles.