A volcanic crater is a circular depression in the ground ...
Magma (from Greek μάγμα "mixture") is a mixture ...
Torf kokosowy (lub inny torf włóknisty) stosowany jest jako ...
Indonesia has the largest mangrove forest. Mangroves are ...
A volcano is an opening, or rupture, in the surface or ...
A pyroclastic flow (also known scientifically as a ...
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