林与鸟王增年北京现有林面积已达１０２５万亩，比１９９０年的８５５万亩增加１７０万亩，平均每年增加３４万亩。树的品种也有所增加，林木覆盖率达到３６．２６％。树多了强化了首都林业的生态功能，以规划保绿化，以绿化保规划，促进规划和绿化走向法制化。林业的发展... Lin and Bird Wang Zengnian The existing forest area in Beijing has reached 10.25 million mu, an increase of 1.7 million mu from 855 mu in 1990, with an average annual increase of 340,000 mu. Tree species have also increased, covering 36.26% of trees. Much of the tree has strengthened the ecological functions of the capital’s forestry, planning to ensure greening, greening to protect planning, and promoting planning and afforestation towards legalization. Forestry development ...