The Environmental Protection Agency has named a new chief for air quality regulations who will help lead the administration’s efforts to limit greenhouse gas emissions.

Janet McCabe became the top air quality regulator on Friday, moving into the role formerly held by new EPA chief Gina McCarthy.

McCabe had served as McCarthy’s deputy in the EPA’s Office of Air and Radiation. She joined the agency in 2009, prior to which she ran children’s health advocacy group Improving Kids’ Environment.