A lahar is a type of mudflow or debris flow composed of a ...
Volcanic cones are among the simplest volcanic formations. ...
Also known as the Emissions Trading System, ETS was ...
Mount Pelee is an active volcano at the northern end of the ...
A whitish semicircular arc seen opposite the sun in fog. ...
Torf kokosowy (lub inny torf włóknisty) stosowany jest jako ...
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