Renewable energy refers to energy sources that are replenished naturally on a human timescale, providing a sustainable and environmentally friendly alternative to finite, non-renewable resources like fossil fuels. The most common types of renewable energy include solar, wind, hydropower, geothermal, and bioenergy, which harness energy from the sun, wind, water, Earth’s heat, and organic matter, respectively. Renewable energy technologies have the potential to significantly reduce greenhouse gas emissions, mitigate climate change, and promote energy security and independence. As research and development continue to advance and costs decrease, renewable energy is becoming an increasingly important component of the global energy mix, paving the way for a cleaner and more sustainable future.