More recently, however, socio-economic development, high population growth, as well as expanded urbanisation and agricultural activity have placed substantial strains on the water resources in the region.
Thousands of years ago, urbanisation and mercantile activity along the western and eastern coast of what is today Kerala and Tamil Nadu led to the development of four large Tamil political states Chera dynasty, Chola dynasty, Pandyan Dynasty and Pallava dynasty and a number of smaller states warring amongst themselves for dominance.
Junk food consumption and sedentary life-style showed strong increasing trends with urbanisation, while physical activity showed decreasing trends.
The question focused here was whether recreational activities and urbanisation may influence orientation performance of talitrids on oceanic tropical beaches with contrasting extension (beach length).
These are complemented by effects of alterations of land use, such as deforestation, intensive agriculture and incidence of fire, with the most extreme effects produced by building activity and urbanisation.
Rapid urbanisation and increased economic activity has also led to increased industrial waste, air, noise and water pollution, which is regulated by the Telangana Pollution Control Board (TPCB).
An interesting change associated with urbanisation, also affecting physical activity, was a reduction in open space, which 'has reduced a lot and now we don't have anywhere to play' (M, 15).
However due to the size of the continent, and different degrees of urbanisation and shifts in economic activities, it is very difficult to generalise.
One important lesson to be drawn from the early waves of urbanisation and the long distance activities of cities is that prized assets and luxury possessions have often been drivers of interconnection and collaboration.
Although it can occur naturally as a result of natural disasters, the main threat today comes via human activities, such as urbanisation and pressure for agricultural land.
