Total area of marginal land suitable for energy plants was estimated up to 130.34 million ha., including forest land (shrub land and open forest land, 50.35%), grassland (45.66%), alkaline land (1.91%) and shoal/bottomland (1.67%). Considering ecoenvironmental effects of development of energy plants on a large scale, together with natural habits of 5 major species of energy plants, total area of marginal land exploitable for development of energy plants on a large scale in recent years, is about 43.75 million ha.