1. Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change,2014
2. Paris Agreementhttp://unfccc.int/paris_agreement/items/9485.php
3. Special Report on Global Warming of 1.5 °C above Pre-Industrial Levels and Related Global Greenhouse Gas Emission Pathwayshttps://www.ipcc.ch/report/sr15/
4. IEA Statisticshttp://www.iea.org/statistics/
5. Communication from the Commission to the European Parliament, the Council, the European Economic and Social Committee and the Committee of the Regions. Energy Roadmap 2050https://eur-lex.europa.eu/legal-content/en/LSU/?uri=celex:52011DC0885