TCS Corporate Sustainability Report 2010-11 - Tata Consultancy ...

In the year FY 2011, TCS reduced the overall per capita carbon footprint (tonnes CO2e per FTE
per annum) by 6.78% over the prior year and by 37.91% over the baseline year 2007-08 (Figure 56).
Figure 56 Steadily reducing Carbon footprint (tCO2/FTE/yr)
Also the per capita carbon footprint due to electricity consumption (DG + Purchased electricity) has
reduced as shown in the exhibit below (Figure 57). This reduction in the energy carbon footprint is a
result of multiple initiatives including procurement of biomass based green power, procurement of
low emissions natural gas based power and various energy efficiency initiatives.
Figure 57 Carbon footprint in tCO2/FTE/yr due to energy consumption (Scope 1 & 2)
Scope 3 emissions, due company-hired vehicles, have increased from 0.004 tCO2e/FTE/yr in 2010-11 to
0.105 tCO2e/FTE/yr due to increased scope of reporting to include company-hired buses used for
employee commuting. This figure is not included in the above figures and performances to maintain
year-on-year data comparability. TCS continues to control its business air travel to the extent possible
by promoting greater use of audio and video conferencing infrastructure.
Ozone Depleting Substances
Refrigerants used in the HVAC systems have an Ozone Depleting Potential, eg. R22. All the ozone
depleting refrigerant gases as per the Montreal Protocol will be phased out and replaced with ODP
free refrigerants. The new facilities coming up at TCS have HVAC systems based on non-ozone
depleting refrigerants. The Ozone Depleting Potential of the total refrigerant emissions is 0.29 tonnes
in FY 2011.
Other Emissions
6
5
4
3
2
1
0
4
3.5
3
2.5
2
1.5
1
0.5
0
4.85
2007-2008 2008-2009 2009-2010 2010-2011
3.656
Emissions from the diesel generator sets, used during power outages, are as below:
3.76
3.176
3.23
Emissions Quantity (tonnes)
SOx 4.26
NOx 522.70
71
3.01
2.479 2.342
2007-2008 2008-2009 2009-2010 2010-2011