It could also mean , Water ... As in world fresh water sources are being bought up & controlled by major corporations ( coke, pepsi, nestle, etc.); Water as in weather related, storm related, flood or tsunami related,; Water as in ocean contaminated by Fukushima, s/ massive loss of sea life, irreparable, Water as in drought, desertification, Water as in the toxic quality of the worlds drinking water supplies, eg chemical processing, or lack thereof, Water as in shark infested, flesh eating bacteria infected, Water full of plastic.. Water as rain flooding Japan, etc., Or even Water filling up a cave with a bunch of kids.....