As cities grow, integrating solar energy into urban infrastructure is key to creating sustainable, "smart" cities. Solar panels can be installed on rooftops, parking lots, and even integrated into building materials, generating clean energy directly where it's needed. This reduces dependence on fossil fuels and lowers urban carbon emissions. Solar streetlights and public transportation systems further enhance energy efficiency in cities. Smart grids, which optimize electricity distribution, can incorporate solar power to ensure reliable energy supply. Harnessing solar energy in urban planning not only improves sustainability but also makes cities more resilient to energy demands and climate change.