Funding for this research was provided by:
Text and Data Mining valid from 2019-11-27
Received: 8 March 2019
Accepted: 21 September 2019
First Online: 27 November 2019
Ethics approval and consent to participate
: No ethical issues pertain to this analysis.
: All authors have approved the manuscript.
: NSB and IS declare no competing interests. SL is employed by Danish Energy; a non-profit association of Danish energy companies, some of which are commercially involved in different parts of the Danish bioeconomy.