1. IEA
, World Energy Outlook 2013, International Energy Agency, Paris, FR, 2013
2. United Nations
, Kyoto Protocol to the United Nations Framework Convention on Climate Change (UNFCCC). United Nations, Paris, FR, 1998
3. The Danish Government, The Danish Climate Policy Plan Towards a Low Carbon Society, 2013, http://www.ens.dk/sites/ens.dk/files/policy/danish-climate-energy-policy/danishclimatepolicyplan_uk.pdf, accessed on 16/11/2014
4. European Commission, 2030 Framework for Climate and Energy – Outcome of the October 2014 European Council, 2014, http://ec.europa.eu/clima/policies/2030/documentation_en.htm, accessed on 16/11/2014
5. Emerging approaches, challenges and opportunities in life cycle assessment