Abstract Background The 2024 Lancet Countdown highlights the urgent need for aligned structural and sustained changes to avoid the most severe global health impacts. According to the latest Emissions Gap Report from 2024 by the UN Environment Programme, the continuation of current policies would lead to 3.1°C of global warming. Climate change exacerbates extreme weather, food insecurity, and disease prevalence, thereby affecting human health, medical practice, and healthcare stability. Physicians increasingly encounter these effects in daily patient care, with alterations in the gut microbiome, air pollution, heatwaves, and shifts in infectious disease patterns affecting gastrointestinal and hepatic health. Methods The United European Gastroenterology (UEG) conducted a comprehensive literature review to assess the climate change associated health hazards and outcomes in gastroenterology as well as the environmental impact of gastroenterology practices. Additionally, the review aimed to identify research gaps and barriers to the implementation of eco-friendly practices in gastroenterology. Results Climate change and healthcare exist in a bidirectional feedback loop: healthcare: emissions, waste and resource consumption from the healthcare sector amplify climate change, which subsequently increases the incidence of GI and liver diseases, heat-related illnesses, zoonoses, vector-borne diseases, and malnutrition. The healthcare sector contributes to 4.4% of global carbon emissions, with gastroenterology procedures, particularly endoscopy as the third highest generator with 3.09 kg of waste per day per bed. The "5 Rs of Greener Gastroenterology" framework—reduce, reuse, recycle, rethink, and research—offer a pathway towards reducing the environmental footprint of gastroenterology. These include minimizing unnecessary procedures, advocating for the Planetary Health Diet, and integrating eco-friendly practices such as telemedicine, digitalization, and sustainability-focused education and research. Promoting roles such as "eco-gastroenterologists," "eco-endoscopists", “eco-intensivist” and "eco-surgeons" is essential to advancing sustainable healthcare on both personal and institutional levels. Conclusion The United European Gastroenterology Green Paper aims to raise awareness and outline key principles that the GI workforce can adopt to tackle the climate crisis together. To facilitate adoption and transformation into clinical practice, UEG has developed a toolkit for stakeholders to promote such concepts and provide possible solutions at any structural level. This is a call to joint action between national und specialist gastroenterology societies.
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