Ecological engineering projects increased vegetation cover, production, and biomass in semiarid and subhumid Northern China

Quanfu Niu, Xiangming Xiao, Yao Zhang, Yuanwei Qin, Xinghai Dang, Jie Wang, Zhenhua Zou, Russell B. Doughty, Martin Brandt, Xiaowei Tong, Stephanie Horion, Rasmus Fensholt, Chi Chen, Ranga B. Myneni, Weiheng Xu, Guangzhi Di, Xiaoming Zhou