The amount of copper needed for this reaction is very small and is frequently found in normal water supplies even when the water is filtered. (thehealthyhomeeconomist.com)
The study looked at subjects deprived of water for 24 hours and those with normal water consumption and found that those without water felt more tired and less alert. (entrepreneur.com)
A third plant had a single diesel - driven pump to provide emergency cooling water to a single reactor in case an earthquake cut off normal water flow. (scientificamerican.com)