Big cities have a profound impact on the environment, both positively and negatively. On one hand, urban areas can promote sustainability through efficient public transportation systems, green spaces, and initiatives aimed at reducing waste and energy consumption. Cities often serve as centers for innovation, leading to advancements in technology and practices that can benefit the environment. On the other hand, the high population density and industrial activities in big cities contribute to pollution, habitat destruction, and increased carbon footprints. Air and water quality can suffer due to emissions from vehicles and factories, while urban sprawl can encroach on natural habitats. As cities continue to grow, finding a balance between development and environmental stewardship becomes increasingly critical for ensuring a sustainable future.