Managing our environmental responsibilities continues to grow more challenging as the rules become more complex. Every day we work to comply with millions of requirements designed to protect the air, water, land and wildlife surrounding our operations. By improving our environmental impact and lowering emissions through our proactive clean energy strategy, we reduce our compliance risk. We have in place a strong environmental management system that guides our compliance efforts. It is based on a corporate-wide environmental policy for which all employees are accountable.
We published our first corporate responsibility report (formerly known as the Triple Bottom Line report) in April 2005, with the contents covering the 2004 calendar year, and we have published a similar report in each following year. Our report is based on Global Reporting Initiative (GRI) G3 Sustainability Reporting Guidelines, the most widely used sustainability reporting framework in the world. Additionally, we incorporate the GRI’s Electric Utilities Sector Supplement indicators wherever possible.