Did you know? Mass of world coal production (2013) (7.82 trillion kg) is 25 x Mass of water in Windermere (English Lake District) (314.5 billion kg) Tweet this comparison
Mass of world gold production (2014) (2.99 million kg)
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"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
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