Between 2004 and 2008 she was general director of the Office of Climate Change and between 2008 and 2011 she assumed the Secretary of State for Climate Change (in the Ministry of Agriculture and Fisheries, Food and Environment) during the government of President José Luis Rodríguez Zapatero.
Entre 2004 e 2008 foi directora xeral da Oficina de Cambio Climático e entre 2008 e 2011 asumiu a Secretaría de Estado de Cambio Climático (no Ministerio de Agricultura e Pesca, Alimentación e Medio Ambiente) durante o goberno do presidente José Luis Rodríguez Zapatero.