1 Subjects: “...energy sufficiency...”

2 Subjects: “...renewable energy sources...”

3 Subjects: “...energy networks...”

4 Subjects: “...energy consumption...”

5 Subjects: “...energy intake...”

6 Subjects: “...activation energy...”

7 Subjects: “...low-energy transport...”

8 Subjects: “...renewable energy...”

9 Subjects: “...energy intake...”

10 Subjects: “...energy reserves...”

11 Subjects: “...energy metabolism...”

12 Subjects: “...energy-efficiency...”

13 Subjects: “...energy...”

14 Subjects: “...METRIC energy balance model...”

15 Subjects: “...METRIC energy balance model...”

16 Subjects: “...energy stress...”