Retrofitting is the process of adding new technology or features to existing structures or systems to improve their performance or efficiency. This can include upgrading buildings with better insulation, installing energy-efficient windows, or adding renewable energy sources like solar panels. The goal is to enhance functionality without the need for complete replacement. In the context of infrastructure, retrofitting can also refer to reinforcing bridges or buildings to withstand natural disasters, such as earthquakes. This practice helps ensure safety and longevity, making older structures more resilient to modern challenges while preserving their historical value.