Americans use 127% more water today than they did in 1950, and over a quarter of the clean water used in American homes is literally flushed down the toilet. This is an alarming statistic, considering that 884 million people across the planet lack access to a clean water supply. While many people survive using only three gallons of water a day, most toilets use three gallons of water with each flush. To save water in his own home, one Redditor and his wife built a greywater toilet sink. Greywater is waste water that has been used to wash dishes in...