Etiket: purification
Are the water purification devices used by the French effective?
Published 04/09/2024 22:41 Video length: 3 min Tap water: are the water purification devices used by the French effective? Are there eternal pollutants in tap water? Veolia, the French water…
The Liberation and the purification, The camps and the return of the despite-us in Alsace
Jean-Laurent Vonau does us the honor of sharing with us his experience during this sad and painful period to incorporate them by force into the German army, he tells us…
Air purification in classrooms | Opening the window, the only solution?
Delivery of CO detectors2 in schools is driving many teachers to want air purification methods other than opening windows. Here are three available technologies. Posted at 5:00 a.m. Mathieu Perreault…