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Mass of world coal production (2013) (7.82 trillion kg) is 2 x Mass of water in Lake Zurich (3.9 trillion kg)
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Pop. of Ethiopia (108.1million)
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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Click here for Podcast: Andrew Elliott interviewed for New Books Network.