Human social life has spillovers such as "wastes", the disposal of which needs systems in place. In early days, the population was less and hence lesser amount of waste was generated such that waste disposal as a system did not become a challenge, they were simply dumped in the landfills. However, with industrial revolution and exponential increase in population, the quantity of waste generated increased, became much more toxic and indisposable causing irreparable damage to the natural and human environment. This along with scarcity of land prompted the industrialized countries, who did not want their landfills to be polluted, to dispose the waste generated into the landfills of poorer countries.