Teco says it has committed to voluntarily reduce greenhouse gas emissions by 4% below the average of its 1998–2001 baseline by 2006.

In July, CCX reached the milestone of one million tonnes of carbon dioxide (CO2) traded. Cumulative volume up to June 2004 was 1,024,000 metric tonnes of CO2, exceeding in its first six months of continuous trading the total volume traded during the first year of the sulphur dioxide cap-and-trade programme.