Land in cities is utilized for a variety of reasons, including: Leisure and recreation can refer to both open space, such as parks, and developed amenities, such as sports centers. Residential construction is the construction of houses and apartments. Road and rail networks, stations, and airports are all examples of transportation. Commercial construction is the building of shops, offices, etc. Cities need land to grow food for their populations, but this resource is becoming increasingly scarce. Urban farms are being built to help solve this problem. Farms within cities are more common in countries where land is cheaper than in America; however they are still rare here. The most famous example is probably New York City's Central Park. Some cities have taken it upon themselves to become more sustainable by creating green spaces within their limits. Examples include San Francisco's Golden Gate Park and Washington, D.C.'s National Mall. But these are not always free for everyone to use. And some cities are growing too fast or too densely to be able to afford to do this; others are simply not interested in doing so. In conclusion, city people need buildings to live in, roads to drive on, and green spaces to relax in.