The Yarrow is a medicinal herb, which is plentiful on the ...
Potable water refers to water that is 'drinkable' and will ...
Mount Etna is an active stratovolcano on the east coast of ...
A volcanic crater is a circular depression in the ground ...
An earthquake's hypocenter is the position where the ...
On 11 April 2012 an undersea earthquake struck near the ...
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