Factor

C1

C2

C3

Sum

Weight

Water and air pollution (C1)

0.6

0.6

0.6

1.8

0.6

Public nuisance (C2)

0.2

0.2

0.2

0.6

0.2

Green area coverage (C3)

0.2

0.2

0.2

0.6

0.2

Total

1

1

1

CI = 0.001

RI = 0.58

CR = 0.002 < 10%