自然界中的大部分树木都有净化空气的作用，它们进行光合作用，就可以吸收二氧化碳及其他有害、无用的气体，经过一系列的转化，转化成氧气，还对气候有调节作用，可以增加空气湿润，改良生长环境。
1、苦楝的净化作用
kulianshifeichangyouliangdejinghuakongqideshuzhong，tazaishengzhangguochengzhongnengxishoukongqizhongdeeryanghualiu、fuhuaqingdengduozhongduirentiyouhaideqiti，rangkongqizhongfuyanglizideshuliangmingxianzengjia，tishengkongqizhiliang。kuliandegenxishengzhangfada，shugantongzhi，kaihuahenmei，tazaiyiniansijidoukeguanshang，duishuitubaochi、jinghuakongqidouyouhentuchudezuoyong。
2、构树的净化作用
goushukeyixishoufeiqi、youduqitihefenchendeng，tadekangwurannenglijiqiang，shihezhongzhizaiwuranbijiaoyanzhongdechangquhuozhejiedaoshang，chengpaichengliedezhongzhikeyiqidaohenhaodejinghuakongqidezuoyong，chengpianzaizhichenglin，keyigaishandangdideqihouhekongqizhiliang。
3、香樟的净化作用
xiangzhangshiyizhongteshudeshumu，tabenshenjiuyouhenqiangdefangchongfangbingdenengli，tadezhiyemaosheng，genxifada，keyijinghuakongqi，hanyangshuiyuan，gaishanzhongzhidehuanjing，duikongqizhongdeyouhaiqitiheqicheweiqidengdouyoujinghuazuoyong。rujinzheizhongshubujinzuoweixingdaoshuzhongzhi，yekeyizuoweijudadejingguanshudanduzhongzhichengjing。
4、夹竹桃的净化作用
jiazhutaojingchangzaizhiyugongluliangbianhuozhegongyuanyijiao，tadejinghuanenglituchu，hahaikeyixishoueryanghualiu、eryanghuatan、fuhuaqing、lvqidengyouhaideqiti，tasuiranyouduxing，danshiduihuanjingdejinghualishifeichangbucuode，yincichangzhongzhiyudaoluliangbianzuokangwurandelindai。
5、绿化工程苗木的用途
yongyulvhuagongchengjianshedeshumudoujuyoujinghuakongqidezuoyong，youdehaiyoujigaodeguanshangzuoyong，bujinkeyizuoweixingdaoshu、lvhuashu，haikeyizhuangshihuanjing、dazaojingguan，yangchengbuyiyangyongtudeshuzhong，youdekezuojingguanshuzhongzhi，youdekezuozaolinshuyingyong。
