Several industry experts say they believe it's only a matter of time before emissions standards are applied to aviation, and that it will be important to apply the proper metrics and targets to those standards through the proper regulatory approach. At the Eco-Aviation conference yesterday in Washington, D.C., a Natural Resources Defense Council International representative stated, "Within the U.S., aviation will be covered in some form or another. Inevitably it's coming." A representative from the EPA said the agency does not have a public position on how aviation emissions will be addressed, and the FAA said it, too, is considering standards for carbon doixide. ATA President and CEO James May said the association supports efforts to address aviation CO2 emissions on an international level through ICAO. "Given that aviation is a global industry, we need a global, sector-specific approach to climate change," May said.