1. EU in Figures. Statistical Pocketbook,2018
2. Balance del Consumo de energía final 2016;Idae,2019
3. “Growing at a slower pace, world population is expected to reach 9.7 billion in 2050 and could peak at nearly 11 billion around 2100;United Nations,2019
4. Water-Food-Energy Nexus;FAO,2019
5. Food and Agriculture Organization of the United Nations, “2050: la escasez de agua en varias zonas del mundo amenaza la seguridad alimentaria y los medios de subsistencia,2015