By 2050, the majority of people will live in cities, so we need to carefully plan them. In some cities, biking can be faster than driving due to congestion. To promote biking, we need more cycle paths and better public transport systems. Saving water and using it efficiently is crucial. “Sponge cities” like Lingang in Shanghai absorb and reuse rainwater through permeable pavements, reducing surface temperature. Shanghai also plans to have rooftop gardens for rainwater storage. Medellín improved its residents’ quality of life by creating parks and green spaces, making the city safer and more enjoyable to walk around.