The "Blue Planet" is a nickname for Earth, which reflects its predominant blue appearance when viewed from space. This characteristic mainly arises from the vast oceans that cover about 71% of Earth's surface, giving it a striking blue hue due to the absorption and scattering of sunlight by water. The term "Blue Planet" is often used to emphasize the importance of Earth’s water resources and the need for their preservation. Earth is also the only known planet to support life, with its diverse ecosystems relying on the intricate balance of water and land features.