1 Subjects: “...passenger transport energy use...”

2 Subjects: “...energy use efficiency...”

3 Subjects: “...energy use...”

4 Subjects: “...energy use...”

5 Subjects: “...energy use...”

6 Subjects: “...energy use prediction...”

7 Subjects: “...energy use...”

8 Subjects: “...direct energy use...”

9 Subjects: “...non-energy uses of fossil fuels...”