Metal mushrooms on the roofs of Berlin used for collecting solar energy.
| German | Solarenergiekollektoren |
| English | Solar Energy Collectors |
| Category | technology |
Solarenergiekollektoren
Metal mushrooms on the roofs of Berlin used for collecting solar energy.
| German | Solarenergiekollektoren |
| English | Solar Energy Collectors |
| Category | technology |