护卫京城的绿色屏障──京郊前山脸爆破造林初见成效□王丹英北京市房山区出水庵是由京城通往云居寺的必经之地，其紧靠公路旁的山坡上，从１９９０年试造开始已连续造林４年，共植树８．３万株，绿化面积已过千亩。过去这里是光秃秃连草都不长的石头山。今日，特别是在金... Protect the capital’s green barrier ─ ─ Beijing front of the hill face blasting afforestation initial success □ Wang Danying Fangshan District, Beijing City outlet is an unaccompanied pass from the capital to the temple, close to the roadside slopes, from 1990 Trial plant has been afforestation for 4 years, a total of 83,000 trees planted, green area has more than acres. In the past it was a rocky mountain that was bare and covered with grass. Today, especially in gold ...