As a result of our focus on reducing manufacturing emissions, WWF has welcomed us into its Climate Savers program, a group of leading corporations from around the world that are working with WWF to dramatically reduce their greenhouse gas emissions.
To improve energy efficiency within our facilities, we started with the basics -- fixing leaks, insulating pipes, reducing pressure and optimizing temperatures to eliminate energy waste.
From there, we are moving to investments in efficient lighting, compressor optimization and heat recovery. We also are investing in combined heat and power and renewable energy.
The total amount of energy consumed by manufacturing sites across our system has grown as our business has grown -- from 54.6 billion megajoules in 2004 to 58.8 billion megajoules in 2010. But our energy efficiency ratio -- the amount of megajoules used per liter of product -- has improved. In 2010, our ratio was 0.45 megajoules per liter -- a 1 percent improvement over 2009 and a 14 percent improvement overall since 2004. By improving our energy efficiency ratio, we avoided $163 million in energy costs for 2010 -- and over $600 million cumulative since 2004.
In October 2009,