Variable effects of biochar on soil greenhouse gas emissions: A meta-analysis of climate, soil, and biochar property interactions - Xiaocheng Liu; Huan Chen; Zhanlei Pan; Jian Wang; Junhong Li; Yaopeng Zhang; Wenqi Zhao; Menghua Zhai; Lizhi Wang; Ao Li; Kunfeng Wang; Hongchun Sun; et al. (Environmental Research, 2026)