1 23 Annals of Forest Science Official journal of the Institut National de la Recherche Agronomique (INRA) ISSN 1286-4560 Annals of Forest Science DOI 10.1007/s13595-014-0440-y Estimating ozone risks using forest monitoring networks—results for science, policy, and society Antonella Cristofori, Giovanni Bacaro, Mauro Confalonieri, Fabiana Cristofolini, Luisa Frati, Francesco Geri, Elena Gottardini, et al.