99
HSE does not report on the following aspects, which are
considered to be less significant:
• waste water originating from cooling systems, if not
contained within a closed-circuit system and not
requiring special treatment;
• atmospheric emissions generated by production
processes, which are not especially significant in most
cases throughout the Group.
PRESENTATION OF ENVIRONMENTAL NUMBERS
This section presents the environmental numbers of
operating units, both at Group level and by category of
products.
As exceptions, the data relating to raw materials -
presented in terms of the efficiency of materials usage
and the emissions of greenhouse gases - reported at Group
level solely to the extent attributable to the use of sources
of energy.
For the first time since the union of Prysmian and Draka,
the information deriving from the factories of the two
parent companies is reported on a combined basis. This
has been made possible by full integration, completed in
2012, of the tools and procedures used to gather data from
the two companies.
Consistent with this, the environmental data for 2012
has been collected using the same criteria at all factories
within the Prysmian Group.
A number of methodological clarifications are needed in
order to ensure that data is correctly read and interpreted:
• in the absence of historical data for Draka prior to 2011,
gathered on the same basis, the trend analysis for the
Group as a whole is limited to just two years (2012 and
2011).
• Since each type of production has very specific
characteristics, associated with the materials used and
