Renewable sources refer to energy resources that can be replenished naturally over time. These include solar energy, which harnesses sunlight, wind energy, generated by wind turbines, and hydropower, produced from flowing water. Unlike fossil fuels, renewable sources are sustainable and have a lower environmental impact, making them essential for reducing greenhouse gas emissions. In addition to the aforementioned sources, biomass and geothermal energy are also considered renewable. Biomass involves using organic materials, such as plant and animal waste, for energy, while geothermal energy taps into the Earth's internal heat. Together, these resources contribute to a cleaner and more sustainable energy future.