Holm oak (Quercus ilex). This tree is resistant to pollution and is often grown in cities. Photographed in Rome,Italy,where samples from the tree's leaves have been used as indicators of air pollution levels | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Szoenyi, Michael |
Taille de l’image : | 4430 px × 2953 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |