Renewable energy refers to energy sources that are replenished naturally and can be used indefinitely, as opposed to non-renewable sources like fossil fuels, which are finite and will eventually run out. Examples of renewable energy sources include solar, wind, geothermal, hydropower, and bioenergy. These sources have the potential to provide a clean and sustainable alternative to fossil fuels, which are the main source of greenhouse gas emissions and contribute to climate change. Increasing the use of renewable energy can help reduce reliance on fossil fuels and decrease greenhouse gas emissions, leading to a more sustainable and healthier environment.

There are several benefits to increasing the use of renewable energy. For example:

1. Environmental benefits: Renewable energy sources produce little or no greenhouse gas emissions, unlike fossil fuels, which are the main source of such emissions. Using renewable energy can help reduce the negative impacts of climate change, such as rising sea levels and more frequent extreme weather events.
2. Energy security: Renewable energy sources are distributed and decentralized, meaning they can be generated locally and do not rely on imports from other countries. This can increase energy security and reduce the risk of disruption to energy supplies.
3. Economic benefits: Renewable energy can create new jobs and stimulate local economies, particularly in rural areas. It can also reduce the cost of energy in the long run, as renewable energy sources often have lower operating costs than fossil fuels.

There are also challenges to increasing the use of renewable energy. For example, some sources, such as solar and wind, are dependent on weather conditions and may not be reliable sources of energy all the time. In addition, the initial costs of setting up renewable energy systems can be high, although these costs are often offset by long-term cost savings.

Overall, the use of renewable energy is an important aspect of a sustainable energy future, and many countries are working to increase the proportion of renewable energy in their energy mix.