For example, paving disrupts the natural drainage patterns so that rainfall runs off the land more rapidly, thereby reducing the amount of moisture absorbed into the soil. To minimize building costs, sites are typically regraded, stripping the land of naturally occurring vegetation.
Buildings alter wind patterns, in some cases creating wind tunnels.
Automobiles and industry pollute the atmosphere, thus increasing summertime heat and glare. These are just few of the ways that the natural environment is affected by the built environment. While these changes can make the environment more functional, these changes typically make the environment harsher, less livable. Cities are made more livable in a variety of ways. For example, unique open space is preserved an protected from development.