| http://www.w3.org/ns/prov#value | - If there was even one empty seat, then the incremental carbon cost of her joining that flight would have been far less than the result of 50 days of going overland. (But that wouldn???t make for much of a book.) The plane flew its course anyway, no matter whether she was on board or not, so you really have to add her 1.8 tonnes on top, making a net increase by her actions.
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