Renewable resources are natural resources that can be replenished or replaced within a human lifetime. These resources are considered sustainable because they can be used without depleting the Earth's finite supply. Examples of renewable resources include solar energy, wind energy, hydropower, geothermal energy, and biomass. Research in this area focuses on developing technologies and methods to efficiently harness and utilize these resources to reduce reliance on non-renewable fossil fuels and mitigate the impacts of climate change. The goal of renewable resource research is to create a more sustainable and environmentally-friendly energy future.