This section of Healing Earth helps you to begin answering the following set of questions that were posed at the end of the case study:
- what are the properties of water that make it essential for life on Earth?
- what is the current condition of the planet’s water resources?
- what are the major human impacts on water quality and quantity in the world today?
The USGS Water Science School is an interactive website all about water and a good resource for investigating in more depth the topics presented in this section.
Water is so common on our planet that its extraordinary properties are often overlooked. It comprises nearly 70% of the mass of the human body and up to 95% of plant body mass. Water helps make the Earth habitable for organisms and has an essential role in physiological processes. These incredible features of water all begin with the molecule.