Development of cities and towns is known as urbanisation. Adverse impact of urbanisation on the ecosystem :
Temperature : Temperature increases severely due to factors such as paving over formerly vegetated land, increasing the number of residences and giant apartments and industries.
Air pollution : There is enormous growth of factories and automobiles due to urbanisation. Harmful emissions of gases and smoke from factories and vehicles cause air pollution. It contributes to allergies and respiratory problems, thereby becoming a huge health hazard.
Water issues : The water cycle changes as cities have more precipitation than surrounding areas. Dumping of sewage can lead to outbreaks of epidemics.
