Original ResearchPublished 1 October 2026Effects of climate change and human activities on vegetation net primary productivity: a case study of Henan Province, ChinaZheng Yuan · Jingge Lu · Zhigao Zhang · Jingyu An · Ruijiao Zhang · Huayong Li · Linsong Yu · Maotang CaiFrontiers in Environmental Sciencedoi 10.3389/fenvs.2026.1982914