The relationship between sustainable diets & environmental impact of obesity highlights the growing concern of how food production and consumption patterns contribute to both health and ecological challenges. The shift towards high-calorie, ultra-processed foods not only exacerbates obesity rates but also places a significant strain on environmental resources through agricultural practices, food waste, and carbon emissions. A growing body of research emphasizes the need for sustainable dietary choices that prioritize plant-based foods, reduce meat consumption, and encourage local food systems. Adopting these diets could mitigate both obesity and environmental damage. Promoting sustainable eating habits requires a multi-faceted approach, including public education on nutrition, sustainable food sourcing, and policy reforms aimed at reducing food waste. By making informed dietary choices, individuals can help reduce their ecological footprint while managing obesity risks.