Water is essential for life on this planet and, though 75 percent of the planet is covered in H20, less than 0.08 percent of that is suitable for domestic use. Water, it turns out, is a precious resource on the Blue Planet. Celebrate World Water Day by shrinking your footprint with Planet Green. What the Water Crisis Really Means for You Why is your water footprint so important? What's the risk of not conserving water? The simple reason is that water is everything and conservation is now important everywhere, even in the United States.