PROTOCOL: Interventions to Reduce or Prevent the Effects of Climate Change on Populations Vulnerable to Poverty and Social Exclusion in Low- and Middle-Income Countries: An Evidence and Gap Map.

This is the protocol for a Campbell evidence and gap map (EGM). The objectives are as follows: (1) to develop a systematic taxonomy of intervention types and well-being outcomes to organise the evidence on climate-related interventions for populations vulnerable to poverty and social exclusion in low- and middle-income countries (LMICs); (2) to map existing systematic reviews to show what we know (evidence) and do not know (gaps) about the effectiveness of interventions to reduce or prevent the effects of climate change on these populations, with systematic reviews of process evaluations mapped alongside effectiveness reviews to illuminate the mechanisms, barriers and facilitators that shape intervention outcomes; (3) to provide structured database entries for included reviews, summarising the intervention, context, study design, sources of evidence and main findings, and appraising each review's methods using a standardised checklist; and (4) to provide a searchable database that maps relevant systematic reviews by intervention type and outcome category to support policy decision-making.