https://yougov.co.uk/news/2017/08/30/brits-are-more-likely-have-been-paris-edinburgh/
https://www.eurofound.europa.eu/sites/default/files/ef_publication/field_ef_document/ef18019en.pdf
https://orsted.com/-/media/WWW/Docs/Corp/COM/Barometer-campaign/Green-Energy-Barometer-2017_with-appendix.ashx?la=en&hash=65C5D0F30494C277249CA7622AF0229AD5B6D3CB
https://home.treasury.gov/system/files/136/Treasury_Study_WoA.pdf