Activity for erik‭

Type	On...	Excerpt	Status	Date
Question	—	Does water in the sun get purified from or polluted by algae, fungi and bacteria? We live at 27° latitude, about 200 metres above sea level and drink water from PET bottles laying around on the soil (SODIS method). They are filled with fresh water from a well and reused over and over again. We drink the water directly from the bottles (without glasses, mugs or cups). We only ... (more)	—	over 10 years ago