Investment Rating - The report does not explicitly provide an investment rating for the industry analyzed. Core Insights - Global fertility is declining, with significant variations influenced by climate-related hazards, particularly distinguishing between population disruption and lethality [4][20][26]. - Climate-related hazards do not show a systematic fertility response under population disruption but are linked to persistent fertility reductions under lethality lasting at least 15 years [20][22][26]. - Different types of climate hazards have varying impacts on fertility, with storms and droughts leading to declines, while heat and cold waves may result in modest increases [20][23][26]. Summary by Sections Introduction - Fertility rates have sharply declined globally, with most regions falling below replacement levels by 2023, except for Oceania and Africa [10][11]. - The decline is attributed to factors like education, delayed marriage, and economic costs of child-rearing, alongside emerging challenges like climate change [11][12]. Methodology - The study combines global fertility data with disaster records from 1950 to 2023, using two measures of disaster exposure: population disruption and lethality [18][19]. - A generalized difference-in-differences design is employed to estimate dynamic fertility responses to disasters [19][20]. Results - Under population disruption, climate-related hazards do not produce systematic fertility declines, while under lethality, they are associated with long-lasting reductions [22][26]. - Disaggregating climate-related hazards reveals that storms and droughts drive significant fertility declines, whereas heat and cold waves are linked to modest increases [23][26]. - Fertility responses vary over time, with lethality effects being modest but consistently negative, and showing little amplification in low-income settings [25][26]. Discussion - The findings indicate that fertility responses to climate-related hazards depend on the type of hazard and the severity dimension, rather than following a uniform pattern [26][27]. - The attenuation of lethality-based effects in recent decades suggests improvements in vulnerability and preparedness [27][30]. Conclusion - The study provides causal estimates of how climate-related hazards affect fertility, emphasizing the need for policies that maintain access to reproductive health care and household stability following severe events [30][34]. - Future research should link fertility more directly to climate anomalies and examine both acute shocks and slow-onset climatic stressors [34].