The world tsa inhibitor grew from 3.1 billion in 1960 to almost 7 billion in 2010 and it is projected to increase to 8 billion by 2025 and to 9.3 billion by 2050. World urban population also sharply increased from 1 billion in 1960 to 3.5 billion in 2010 and it is projected to reach 4.5 billion in 2025 and 6.4 billion in 2050 accounting for a population share increasing from 30% in 1960 to 68% in 2050 .
As the world?s population grew and became more urban, global solid waste generation is estimated to have increased tenfold in a century from 110 million tonnes in 1900 to 1.1 billion tonnes in 2000 . Currently, the global MSW generation is estimated at about 1.3 billion tonnes per year, and it is expected to increase to approximately 2.2 billion tonnes per year by 2025. A significant increase of the waste generation rates per capita has been also projected, from the current 1.2 kg per person per day to 1.42 kg per person per day until 2025 .
Africa faced a particularly rapid population growth, from 294 million in 1960 to 1.0 billion in 2010 and it is expected to increase to 1.4 billion by 2025 and 2.2 billion by 2050. The urban population grew from 56 million in 1960 to 409 million in 2010 and it is projected to further increase to 672 million in 2025 and 1364 million in 2050. In 2010, more than 42% of the population in Africa lived in urban areas, increasing from 20% in 1960, and could reach 47% in 2025 and 62% in 2050 . Even if waste generation rates per capita are lower than in developed countries, developing countries produce large amounts of waste. These amounts are expected to rise with increased population, urbanisation and improved lifestyle; this is would result in additional challenges to waste management systems and in an additional pressure on the environment.