The rate of vegetation coverage in Chengdu reaches 30.1 percent, and garbage treatment 100 percent, noise in tourist attractions averages below 60bd, and noise in urban area 54.9bd. The air pollution index indicates 78, and average drinking water quality in the city amounts to 99.1 percent. In 1997, in the comprehensive environment examination of 46 major Chinese cities, Chengdu won the fourth place in comprehensive score, the second place in environmental quality, and ranked the first among inland citi