On the basis of describing characteristics and condition of application of natural growth model of population, weighted average growth model, regression forecast model and GM（1,1）forecast model, taking Gushi County in Henan Province as an example, according to the statistics of...

<title>Abstract</title> Despite the dominant role service industries play in modern society, little attention has been paid to assessing and improving their environmental performance. In this research, environmentally related performance data for six different service organisations were acquired, and the...