The urban environment afforests the ecology principle .

城市环境绿化中的生态学原则。

In the garden planted the massive gingkos , the pointed zelkova , ma guamu and so on many big specification tree , the plant to be scattered and organized , afforests each level clearly demarcated .

园内种植了大量银杏、榉树、马褂木等许多大规格乔木、植物错落有致，绿化层次分明。

Each year , china creates 5.3 million hectares of forests , afforests another 3.7 million hectares of mountains where hunting and grazing are prohibited , and plants 2.4 billion trees by advancing the compulsory tree-planting campaign .

中国每年新增530万公顷森林，绿化370万公顷山地，禁止捕猎和畜牧，推行强制种树计划种植树木24亿棵。