Stolaroff, Joshuah K. http://orcid.org/0000-0003-3290-5843
Samaras, Constantine http://orcid.org/0000-0002-8803-2845
O’Neill, Emma R.
Lubers, Alia
Mitchell, Alexandra S.
Ceperley, Daniel
Article History
Received: 13 October 2015
Accepted: 28 November 2017
First Online: 13 February 2018
Change Date: 8 March 2018
Change Type: Correction
Change Details: In the original version of this Article, the first sentence of the sixth paragraph of the “Comparing emissions” section, the Results originally incorrectly read as ‘In the base case, delivery of a small (0.5 kg) package with the small quadrotor drone has lower impacts than delivery by diesel truck, ranging from a 59% reduction in GHGs in California, to a 17% reduction in Missouri’. The correct version states ‘54%’ instead of ‘59%’ and ‘23%’ instead of ‘17%’.
Change Details: The fourth sentence of the same paragraph originally incorrectly read as ‘In the base case, delivery of a medium-sized (8 kg) package has 17% lower GHGs than delivery by truck in California, is about equivalent to delivery trucks for the U.S. average electricity mix, but has 77% higher GHGs than truck delivery in Missouri, which has a carbon-intensive electricity grid’. The correct version states ‘In the base case, delivery of a medium-sized (8 kg) package has 9% lower GHGs than delivery by truck in California, is about 24% higher than delivery trucks for the U.S. average electricity mix, and has 50% higher GHGs than truck delivery in Missouri, which has a carbon-intensive electricity grid.
Change Details: The last sentence of the seventh paragraph of the same section originally incorrectly read as ‘Because of the importance of electricity used to power the octocopter, charging with low-carbon electricity of 200 g GHG/kWh can reduce delivered package GHGs by 34% compared to diesel trucks’. The correct version states ‘37%’ instead of ‘34%’.
Change Details: These errors have been corrected in both the PDF and HTML versions of the Article.
Competing interests
: The authors declare no competing financial interests.