Carbon Dioxide Fertilization Greening Earth, Study Finds, APR 26, 2016, Karl B. Hille
https://www.nasa.gov/technology/carbon-dioxide-fertilization-greening-earth-study-finds/
NOAA Satellite Data Used in Study Finding Significant Greening in Earth's Vegetative Areas, April 26, 2016, https://www.nesdis.noaa.gov/news/noaa-satellite-data-used-study-finding-significant-greening-earths-vegetative-areas
Here are the two articles given at the end of that writing
https://www.eurekalert.org/news-releases/876845
and,
Zaichun Zhu, Shilong Piao, Ranga B. Myneni, Mengtian Huang, Zhenzhong Zeng, Josep G. Canadell, Philippe Ciais, Stephen Sitch, Pierre Friedlingstein, Almut Arneth, Chunxiang Cao, Lei Cheng, Etsushi Kato, Charles Koven, Yue Li, Xu Lian, Yongwen Liu, Ronggao Liu, Jiafu Mao, Yaozhong Pan, Shushi Peng, Josep Peñuelas, Benjamin Poulter, Thomas A. M. Pugh, Benjamin D. Stocker, Nicolas Viovy, Xuhui Wang, Yingping Wang, Zhiqiang Xiao, Hui Yang, Sönke Zaehle & Ning Zeng , Greening of the Earth and its drivers. Nature Clim Change 6, 791–795 (2016). https://doi.org/10.1038/nclimate3004.
Abstract, https://www.nature.com/articles/nclimate3004