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4. EEA, 2015, EEA greenhouse data viever at 2015-08-06: http://www.eea.europa.eu/data-and-maps/data/data-viewers/greenhouse-gases-viewer.
5. EU Commission, 2011, White Paper Roadmap to a Single European Transport Area – Towards a competitive and resource efficient transport system, Brussels: http://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=CELEX: 52011DC0144&from=EN.