sewage
Providing a safe haven for winged visitors
Many species of birds fly long distances to avoid the cold weather and poor food availability in the higher latitudes in winter. They fly towards…
43 kg gold and 3 tonnes of silver found from sewage in Switzerland
The Swiss metal concentrations complied with regulations and were removed before humans drank the water again (Photo: Pixabay) Zurich: While London’s sewers can get clogged…
