Table 1. The number of indicators and variables comprising the Environmental Sustainability Index (ESI) in 2001, 2002, and 2005.



ESI 2001
ESI 2002
ESI 2005

Number of
Number of
Number of
Component
indicators
variables
indicators
variables
indicators
variables
Environmental systems (SYSTEM)
5
13
5
13
5
17
Reducing environmental stresses (STRESS)
5
15
5
15
6
21
Reducing human vulnerability (VULNER)
2
5
2
5
3
7
Social and institutional capacity (CAP)
7
22
5
22
4
24
Global stewardship (GLOBAL)
3
12
3
13
3
7
Total
22
67
20
68
22
76