Singtel Sustainability Report 2010/2011

REDUCE IMPACT ON CLIMATE CHANGE AND GHG EMISSIONS

Our main source of greenhouse gas emissions are from our energy use.

GHG emissions from electricity use
As we still rely primarily on electricity purchased from the national power grid, the majority of our greenhouse gas emissions are indirect. Our overall carbon equivalent emissions from our electricity use in the year were 141,710 tCO₂e, a 7,500 tCO₂e decrease from the previous year due to differing generation mix².

GHG emissions from air travel
The GHG emissions³ from our air travel are estimated to be 2,628 tCO₂e, a reduction of 393 tCO₂e from last year, despite the inclusion of NCS in this year's figures. Apart from encouraging the use of video or telephone conferencing to reduce the need for business air travel, we have also improved our system for monitoring business air travel which allowed us to capture a better representation of our CO₂ emissions.

²The equivalent CO₂ emissions for electricity use are calculated based on the 2008 and 2009 operating margin grid emission factors from the National Environment Agency in Singapore³ The emission factors for air travel used are based on DEFRA UK guidelines