Urbanisation is the process by which the proportion of people living in cites and towns rises in comparison to rural areas. Urbanisation in London, England, as a developed which was at that time developing country and city, started around the 1760s continuing through to the 19th century, by which time 80% of the population was urban dwellers, sparked by the industrial revolution. So this is a time span of around 150 years, whereas in a developing country, Mumbai for example in India saw large increased of population from just under 3 million in 1951 to just over 20 million in 2010, a time period of only 60 years in comparison.
The two causes of urbanisation are rural to urban migrations and a rise in natural population growth due to the age of the migrants, this is normally young adulthood so the most fertile years, this means there are greater numbers of families. The main cause the migration from rural areas to urban, people are pushed from their rural homes due to factors such as the mechanisation of the agricultural industry, meaning many who gained employment from this industry are surplus to requirements. An example of this is the green revolution, a programme that started in the 1940s and began in India in 1961, it financed agrochemicals, and developed irrigation systems and imported high yield varieties into India, forcing many Indians in the agriculture industry to relocate for employment purposes. But this can create major issues in the city, such as the overcrowding of housing or the new dwellers are simply unable to pay rent, so slums begin to appear and grow. India also became urbanised due to it’s location, it had access to sea on two sides and the British colonial administration in India developed the sheltered inlet into a major port. The British viewed the port and surroundings as the ”Gateway to India”.