Water is a clear, tasteless liquid that is essential for all forms of life. It covers about 71% of the Earth's surface and is found in oceans, rivers, and lakes. Water is made up of two hydrogen atoms and one oxygen atom, which gives it the chemical formula H2O. It plays a crucial role in various processes, such as drinking, cooking, and cleaning. In addition to being vital for humans, water is also important for plants and animals. Photosynthesis, the process by which plants make their food, relies on water. Furthermore, many ecosystems, like wetlands and coral reefs, depend on clean water to thrive and support diverse wildlife.