Conducting systematic searches in three bibliographic databases: PubMed, PsycINFO, and Embase.

The 16 core characteristics of systematic reviews was assessed with the AMSTAR 2.

The following data from the included meta-analyses were extracted: the examined climate-related factor, the design of the included studies in the meta-analysis, the number of included studies, the aggregated number of participants in the primary studies, the population, and the instrument used to measure the quality of primary studies. The mental health outcome, a summary of the pooled outcomes, the significance of the outcomes, the level of heterogeneity [I 2 and its 95% confidence interval (CI)], and (when reported) the outcomes of the analyses examining publication bias also were extracted.