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Wetlands, vital ecosystems that support 40 % of the world's species and serve as nature's water filters, are disappearing three times faster than forests. While global research extensively examines the increasing degradation of wetland health, there exists a significant research gap concerning its impact on livelihoods and the achievement of Sustainable Development Goals (SDGs). To address this gap, a systematic review was conducted following the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) guidelines, utilising data from 1270 database records and 350 research studies spanning 1990 to 2023. The study reveals alarming annual wetland health loss rates ranging from 0.02 % to 3.14 %, driven globally by built-up areas, agricultural expansion, climate change, and pollution. Notably, developing countries and those with lower development indices exhibit the highest rates of …