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As climate change becomes a global priority, the shift toward renewable energy sources is more critical than ever. Fossil fuels—coal, oil, and natural gas—are major contributors to greenhouse gas emissions, but renewable energy sources like solar, wind, and hydropower provide a sustainable alternative. In many parts of the world, renewables are rapidly becoming cheaper than traditional energy sources. Countries like Germany, China, and the United States are investing heavily in expanding renewable energy infrastructure, with goals to reduce carbon emissions and meet climate targets. However, the transition is not without challenges. Integrating renewable energy into existing grids, ensuring consistent supply, and improving energy storage technologies are areas that need continued innovation. Despite these obstacles, renewable energy is key to mitigating the worst impacts of climate change and ensuring a cleaner, healthier future for all.