The three-period (1995, 1998 and 2003) remote sensing images in Jinan City, China are selected. And the information of green land, construction land, woodland and water body is extracted by using the
This paper analyzes the multiplex composite function of agriculture comprehensively as follows.The first is political function:it can ensure the national food s
China’s poor energy development and in-situ conversion legislation, environment laws and energy laws lead to a severe environmental issue in energy source. Thi