As Tucson’s fuel mix shifts toward alternative resources, our emissions profile is improving. These charts show the decline in carbon dioxide, nitrogen oxides and sulfuric dioxide emissions, as well as the decrease in water consumption over a nearly three-decade span.
You should know that these charts are based on TEP's 2014 Integrated Resource Plan, which treats energy efficiency (EE) like any other energy resource. For that reason, they include both the energy TEP delivers and the energy we won't have to produce thanks to our EE programs. That's why the percentages shown for other resources — like renewable energy — are smaller than their share of our actual energy mix. So rest assured that TEP is on track to meet or exceed Arizona's Renewable Energy Standard, even if the percentages shown here appear to lag behind those annual goals.