Earth is a planet whose surface is close to 72% covered by water. There is no other place like our planet. Earth is unique with its liquid water oceans, seas, lakes and rivers. Astronomers have yet to discover a planet with liquid water. Life began in our oceans and life continues to live and be influenced by the oceans. Most life on Earth cannot survive without water or the Sun. Our climate is greatly influenced by the exchange of solar radiation within the atmosphere.
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