In 2010, total fossil fuel energy use for all Mars, Incorporated operations was 20,973 terajoules (TJ), a reduction of 6.3 percent from our 2007 baseline. This reduction was due to three factors:
- Increased use of renewable energy
- Improved energy efficiency
- Lower production levels.
In addition, in 2010 we used 471 TJ of energy from renewable sources, over three times more than in 2007. This contributed 1.6 percent of our fossil fuel energy reduction.
The remaining reduction in energy use of 4.7 percent is lower than we hoped to achieve. It is also difficult to determine how much was the result of efficiency improvements and how much was due to reduced production volumes. If we are to meet our 2015 goal of a 25 percent reduction, we must continue to focus on increasing energy efficiency and our use of renewables so that as production volumes increase, our fossil fuel energy use continues to decline. We continue to seek opportunities to expand the good practices described throughout this section to more operations.
Our total operational energy use in 2010 resulted in companywide scope 1 and 2 GHG emissions of 1,833 kilotonnes of carbon dioxide equivalent (CO2), a 4.2 percent reduction from the 2007 baseline.
Despite our targets, energy use and/or GHG emissions increased in some segments. Mars Drinks' total energy use increased 9 percent and GHG emissions increased 23 percent after installing a self-generating nitrogen system for the fresh pack manufacturing process at its West Chester factory in the United States. However, independent lifecycle analysis shows that the new system actually creates 65 percent fewer carbon dioxide emissions than sourcing nitrogen externally, though the savings are in our supply chain (scope 3), outside the scope of our operations. We continue to monitor energy use at the site, to find other opportunities to make savings.
Greenhouse gas emissions have risen by 9 percent and energy use by 13 percent since 2007 at Mars Food. This is primarily because our Greenville site in Mississippi, U.S., used to generate energy from burning rice hulls, but now uses natural gas. Secondly, we see a significant volume shift from dry rice to ready rice which is a more energy intensive technology. We are actively seeking ways to address this increase in energy use and GHG emissions.
Wrigley reduced energy use by 5 percent but saw an increase in GHG emissions of 2 percent. This increase was due to significant growth in parts of the world with higher-carbon electricity grids.
