Harnessing renewable energy sources, such as solar panels, wind turbines, and geothermal systems, transforms urban buildings into clean energy generators. Placing solar panels on rooftops, integrating building-mounted wind turbines, or utilizing geothermal heating and cooling systems can dramatically reduce reliance on fossil fuels. Municipal incentives and advances in technology are making these systems more accessible and cost-effective for urban applications. By widespread adoption of on-site renewable energy, cities can lower their carbon footprints, reduce utility costs for residents, and increase energy independence, furthering the transition toward sustainable living.