We’ve reduced emissions without sacrificing reliability by increasing our use of natural gas. Our purchase of the gas-fired Gila River Power Station four years ago has offset the loss of coal-fired resources. We’re also using natural gas-fired turbines to compensate for the intermittent output of our growing renewable power portfolio.
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.