What would we do without H2O? It is essential to our daily life. Without water, or any source H2O it would be very difficult for not only humans, but for any animal, plant, or living organisms as well. There are many reasons H2O is important, to our health and to the world around us. Water delivers important nutrients to all of our cells and boosts our energy. Water helps with digestion and keeps us hydrated. Without water, there would be no life on earth at all. Water is one of the most important substances to exist on earth. All humans, plants, and animals, must have water to survive. Human bodies are made up of about 60% water and if we were to go a few days without it, we would not be able to survive. In conclusion, without H2O it would be extremely difficult for anyone to survive on Earth.