The natural water cycle
The natural water cycle is powered from solar energy. Its thermal radiation evaporates water from oceans, lakes and rivers into water vapour. As precipitation, the water enters lakes, rivers and groundwater and eventually flows into the sea. Author: 3sat/nano, mirror TV, Christine Voges, R. Engelke+S. Karm+F. Gutsche+J. Heck+B. Asgari, K. Scheef+F. Buscha, Tim Kunter Translation and redub: alugha