摘要
○The nationwide campaign of affores-tation on voluntary basis in China waslaunched in 1981.By 1991, the totalgreenland in cities across the countryreached 57,900 ha., and the greening areaalong highways 28,900 ha. The averagegreening area per capita rose from 2.3 sq.min 1981 to 3.9 sq.m, and the green coverfrom 14.8% to 19.2% in cities among
