| A sign on Roosevelt Island, New York, USA, warning of lead, which is well-known as a poisonous substance to humans. | |
| Lizenzart: | Lizenzpflichtig |
| Credit: | Science Photo Library / Williamson, Mark |
| Bildgröße: | 5163 px × 3456 px |
| Modell-Rechte: | nicht erforderlich |
| Restrictions: | - |