Edwards, Morgan R.
Trancik, Jessika E.
Article History
Received: 27 September 2013
Accepted: 20 March 2014
First Online: 25 April 2014
Change Date: 25 April 2014
Change Type: Erratum
Change Details: In the print version of this Letter, theyaxes in Fig. 4a,b should have been labelled 'Impact (g CO2-eq km-1)'. In addition, the first sentence of the author contributions should have read 'J.E.T. developed the concept and designed the methods for the study.' These errors have been corrected in the HTML and PDF versions of the Letter.
Competing interests
: The authors declare no competing financial interests.