3月12日，重庆璧山市民参加“乡土植物进城”植树活动。当日，重庆市璧山县启动“千种乡土植物进城”行动，计划到2015年实现引进乡土植物3000种，实现城市生态系统有机循环。近年来，璧山县大力推进生态文明建设，城市面貌不断变化，现已引进1000余种植物，人均绿化面积20余平方米。新华社记者 李健 摄     On March 12,,Chongqing bishan citizens to participate"Native plants into the city"Planting trees activities.On the day,Chongqing bishan start"One thousand species of native plants into the city"action,Plan implementation introduced 3000 species of native plants by 2015,Implementation of organic urban ecosystem circulation.In recent years,Bishan promote the building of ecological civilization,Changing cities,Has introduced more than 1000 kinds of plants,Per capita green area of more than 20 square meters.The xinhua news agency reporters li perturbation

    重庆璧山观音塘湿地公园生态环境优越，成为市民休闲的好去处（3月11日摄）。新华社记者 李健 摄     Chongqing bishan guanyin pond wetland park ecological environment is superior,Be a good place for recreation(March 11 is taken).The xinhua news agency reporters li perturbation