Search results for “natural swimming pool”

Is swallowing pool-pee bad for your health?

How much of someone else's pee could you be swallowing while taking a swim? And is it dangerous? This week, Risk Bites takes on the terribly important topic of peeing in swimming pools. Surprisingly, beyond the yuck factor of drinking someone else's urine, there is a more serious hazard -- produc

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. Engelk

Natural Landscape of North America

Europe could fit twice into North America. This cultural region includes Canada and the USA. The natural landscape is defined by five major regions. From the tropics to polar regions, all climate zones are represented. Authors: ZDF/Terra X/Susanne Hillmann/Iris Gesang/Spiegel TV/Maximilian Mohr Tr