They fall under the Tertiary sector of the economy.
It is our primary protection from strong UV-B electromagnetic radiation from the sun.
“A hot spot develops above the plume. Magma generated by the hot spot rises through the rigid plates of the lithosphere and produces active volcanoes at the Earth's surface. As oceanic volcanoes move away from the hot spot, they cool and subside, producing older islands, atolls, and seamounts.” Oregon State University
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What's the problem????......
