Source and Type of GHG

In 2008, total gross GHG emissions were 533.2 kilotonnes of carbon dioxide equivalent (CO2e), or 3.8 per cent below the 1990 baseline. In 1990, 554 kilotonnes of carbon dioxide were produced.

Type of GHG

On a CO₂e basis, carbon dioxide is the primary greenhouse gas emission from our operations. In 2008, this accounted for 94 per cent of our total, followed by:

• 4 per cent methane;
• 1 per cent sulphur hexafluoride;
• 1 per cent nitrous oxide.

Source of GHG

Most of our emissions are produced when coal and natural gas are burned to generate electricity. In 2008, this accounted for 88 per cent of our total, followed by:

• 5 per cent emissions from fleet vehicles;
• 4 per cent natural gas operations;
• 3 per cent other.