Extraction of aluminium metal takes place in three main stages¿mining of bauxite ore, refining the ore to recover alumina and smelting alumina to produce aluminium. Bauxite is mined by surface methods (open-cut mining) in which the topsoil and overburden are removed by bulldozers and scrapers.
Penumbra,<span> the Moon's faint outer shadow. Partial solar eclipses are visible from within the penumbral shadow.</span> And Umbra,<span> the Moon's dark inner shadow.<span> Total solar eclipses are visible from within the umbral shadow</span></span>
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