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2. European Commission Report from the Commission to the European Parliament and the Council,2019
3. Energy Efficiency Targetshttps://ec.europa.eu/energy/topics/energy-efficiency/targets-directive-and-rules/eu-targets-energy-efficiency_en
4. European Commission 2020 Climate & Energy Packagehttps://ec.europa.eu/clima/policies/strategies/2020_en
5. Report on the Proposal for a Directive of the European Parliament and of the Council on the Promotion of the Use of Energy from Renewable Sources,2019