What is a energy resource that can be recycled or replaced by natural processes in less than 100 years?

A renewable energy resource that can be recycled or replaced by natural processes in less than 100 years is solar energy. Solar energy harnesses sunlight using photovoltaic cells or solar thermal systems, which can be continuously replenished as the sun shines daily. Unlike fossil fuels, solar energy has minimal environmental impact and can be effectively utilized without depleting the resource. Additionally, advancements in technology continue to enhance the efficiency and accessibility of solar energy systems.