The statistical map is usually used to indicate the quantitative features of various socio economic phenomena among regions on the base map of administrative divisions or on other base maps which con
Emission factor is a measure of pollution intensities caused by economic activities, which can be used to assess potential for pollution reduection. With the emission factors derived based on relative
In 1994, the total Chinese population in the United States were 2,017,799 which were 0.8 percent of the total US population. The Chinese population were highly concentrated by regions and among the to
China has made remarkable progress in Chethecal fertilizer (CF) industryin the past decades. Ih 1995 the output of CF reached 24.97 whllion (M for short)tons. The aggregate consumphon in the past 46 y