what is valcano??????
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A volcano is an opening in the earth's crust through which lava, volcanic ash, and gases escape. ... Beneath a volcano, liquid magma containing dissolved gases rises through cracks in the Earth's crust. As the magma rises, pressure decreases, allowing the gases to form bubbles.
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a volcano is an opening from the earth which acts as a depressuriser. It reduces the pressure inside the earth by releasing toxic gases and the hot molten lava.
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