Valsts valodas centra izstrādātie vides zinātņu, zemes zinātņu un fiziskās ģeogrāfijas termini

Konteksts: [..] Second, renewable energy sources need conventional energy sources as back-up [..]
Avots: COMMUNICATION FROM THE COMMISSION TO THE COUNCIL AND THE EUROPEAN PARLIAMENT - The share of renewable energy in the EU - Commission Report in accordance with Article 3 of Directive 2001/77/EC, evaluation of the effect of legislative instruments and other Community policies on the development of the contribution of renewable energy sources in the EU and proposals for concrete actions