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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)
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Other land in Costa Rica (2011) (5,830 km^2)
If this was a standard unit ...
"This is a fun and riveting book. Written in an accessible and engaging way, it is unputdownable." Frost Magazine
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