[Hypotheses concerning the forest decline in Alpine environment]

acide chlorhydrique acido cloridrico air pollution alpine vegetation bosques clima climat climate enfermedades de las plantas estoma europa europe foreste forests fotosintesi hydrochloric acid inquinamento dell'aria maladie des plantes malattie delle piante ossidazione oxidation oxydation ozone ozono photosynthese photosynthesis plant diseases stoma stomata stomate vegetazione alpina