Non-nuclear energy refers to power sources that do not involve nuclear reactions. This includes renewable energy sources like solar, wind, hydropower, and biomass, as well as non-renewable sources like natural gas and coal. These energy types are used to generate electricity and heat, contributing to a diverse energy mix. Renewable energy sources are particularly important for reducing greenhouse gas emissions and combating climate change. They harness natural processes, such as sunlight and wind, to produce energy sustainably. In contrast, non-renewable sources, while currently more prevalent, can deplete over time and have environmental impacts.