Rank

Variables

1

Liquid Fuels

2

Solid Fuels

3

Liquid Fuels ∩ Solid Fuels

4

Solid Fuels ∩ Gas Flares

5

Cement ∩ Gas Flares

6

Cement

7

Gas Fuels

8

Solid Fuels ∩ Cement

9

Solid Fuels ∩ Gas Fuels

10

Liquid Fuels ∩ Gas Fuels

11

Liquid Fuels ∩ Cement

12

Gas Flares