Renewable energy sources, such as solar, wind, hydro, and geothermal, are naturally replenished and have minimal environmental impact. They provide a sustainable alternative to fossil fuels by reducing carbon emissions and dependence on finite resources. Non-renewable energy sources, including coal, oil, natural gas, and nuclear power, are limited and take millions of years to form. Their extraction and use contribute to environmental degradation, pollution, and climate change. While non-renewable sources have historically dominated global energy production, the transition to renewables is essential for long-term sustainability and energy security.