Oceans and Seas
Passage
Oceans and seas cover over 70% of the Earth?s surface and are vital to all life forms. There are five major oceans: the Pacific, Atlantic, Indian, Southern, and Arctic. The Pacific Ocean is the largest and deepest, containing the Mariana Trench?the deepest natural point on Earth. Seas, like the Mediterranean and Caribbean, are smaller than oceans and are partially enclosed by land. Oceans regulate Earth?s climate by absorbing solar radiation and distributing heat around the planet. They are also home to diverse ecosystems?from coral reefs to deep-sea trenches. Oceans support economies through shipping, fishing, and tourism. However, they are under threat from pollution, overfishing, and climate change, making their conservation crucial.
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