Direct and Indirect CO
2
emissions
8.5 Emissions
CO
2
emissions
The production processes in all the ac-
tivity sectors of MYTILINEOS Group re-
sult in air emissions. These emissions
are under the law subject to specific
limits, to which the Group fully con-
forms.
As part of our efforts to address the
issue of Climate Change, we remain
committed to our goal to identify the
carbon dioxide (CO
2
) emission sources
in all our subsidiaries and to measure
and further reduce these emissions.
During 2012, our target regarding the
disclosure of the Group’s total carbon
dioxide emissions was not achieved.
The relevant results, shown in the
graphs that follow, refer to 60% and
20% of our subsidiaries for the dis-
closure of direct and indirect CO
2
emissions, respectively, and to 40% of
the Group companies for the disclo-
sure of other significant greenhouse
gas emissions. As a result, specific
quantitative targets for their overall re-
duction cannot be set for next year.
The increase of direct CO
2
emissions
observed in 2012 is due to the emis-
sions from the Combined Heat and
Power Plant (CHP) of ALUMINIUM
S.A., as a result of its consumption of
natural gas, which was not used in
2011, and to the operation of the
two power production plants of
PROTERGIA S.A. – the Ag. Nikolaos
Plant (Viotia), which was in operation
for entire year, and the Ag. Theodor-
oi Plant (Korinthos), which entered in-
to commercial operation in April
2012.
65
S U S TA I NAB I L I T Y R E PORT 2 0 1 2
0
1,000,000
2,000,000
3,000,000
4,000,000
5,000,000
2011
2012
Direct greenhouse gas emissions for all sources owned or controlled by the company.
Indirect greenhouse gas emissions from the production of purchased electricity, heat or stream.
Total greenhouse gas emissions (direct + indirect).
535,801
2,490,643
3,026,444
2,503,169
2,185,241
4,688,410
In the Metallurgy sector (aluminium production):
Emissions from fuel oil burning are calculated in accordance with the
provisions of Decision 2007/589/EC (Annex II), using a national emis-
sion factor and the corresponding Net Calorific Value (NCV). Emissions
from the lime production process are also calculated in accordance with
the same Decision (Annex VIII). Emissions from the anodes baking and
consumption processes are calculated using the formulas of the IPCC
guidelines, as these were adopted by the Implementing Regulation
2011/540/EC.
For calculating indirect carbon dioxide emissions, a conversion factor of
0.85 was used (i.e.: electricity consumption in kWh*0.85). More specif-
ically, the factor used for 2011 was 0.85 t CO
2
/MWh. This factor is
weighted for the contribution from each type of energy source.
In the Energy sector:
The methodology for the calculation of carbon dioxide emissions is based
on calculations in accordance with the stipulations of Annex IV of Di-
rective 2003/87/EC and the provisions of Decision 2007/589/EC. Emis-
sions from source flows are determined based on activity data obtained
with the help of measurement systems and on additional parameters
resulting from laboratory analyses or standard emission factors.
Methods for the calculation of direct and indirect CO
2
emissions
