The Montseny Biosphere Reserve is one of the Pyrenees ...
The Bouillouses Lake is one of the world natural sites that ...
The Yarrow is a medicinal herb, which is plentiful on the ...
Krakatoa is a volcanic island situated in the Sunda Strait ...
A fracture is any separation in a geologic formation, such ...
A volcanic winter is a reduction in global temperatures ...
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