TY - JOUR AU - Vindel, Jose M. AU - Trincado Aznar, Estrella AU - Sánchez Bayón, Antonio PY - 2021 DO - 10.3390/en14071994 SN - 1996-1073 UR - https://hdl.handle.net/20.500.14352/7040 T2 - Energies AB - The European Union Green Deal aims at curbing greenhouse gas emissions and introducing clean energy production. But to achieve energy efficiency, the opportunity cost of different energies must be assessed. In this article, two different energy... LA - eng M2 - 1994 PB - MDPI KW - EU Green Deal KW - Horizon 2030 KW - clean energy production KW - high-rate algal ponds (HRAP) KW - activated sludge system (AS) KW - photovoltaic power (PV) TI - European Union Green Deal and the Opportunity Cost of Wastewater Treatment Projects TY - journal article VL - 14 ER -