Managing air emissions is a large initiative at TransCanada because of the nature of our business. We use turbine engines to compress gas and push it through our pipelines. Some of our facilities utilize electrical energy, while others—typically in more remote areas—use clean burning natural gas to fuel the turbine engines. Our simple cycle, combined cycle and co-generation power facilities also fuel their turbines by using clean burning natural gas. As a result, these facilities all generate nitrous oxide emissions. We operate them in a manner that meets the stringent air quality guidelines and requirements of the various jurisdictions in which we operate.