The Cost of Environmental Degradation in the Three Zones of chongqing Municipality 0000 10 1997 1998 1999 2000 2001 2002 口 SanXia region19.95187921.4221.7123.4921.069 口 West Chongqing22.88 23.94 23.72 28.22 26.86 29.62 口 Urban26.0124.1525.3125.624.525.830 1 0 2 0 3 0 4 0 5 0 6 0 7 0 8 0 9 0 SanXia region 19.95 18.79 21.42 21.71 23.49 21.69 West Chongqing 22.88 23.94 23.72 28.22 26.86 29.62 Urban 26.01 24.15 25.31 25.6 24.5 25.83 1997 1998 1999 2000 2001 2002 The Cost of Environmental Degradation in the Three Zones of Chongqing Municipality