The pie chart illustrates the percentage of nine kinds of waste processed in a nation between 1960 and 2011.
Overall, while the figure for wood, metal, plastic and food increased, the opposite was true for textiles, paper and other. Besides that, the rate of glass and green waste stayed unchanged throughout the period.
Regarding the pie chart in 1960, the proportion of waste treated for paper accounted for a quarter, in comparison with 17% and 12% in the figure for textiles and others respectively. However, over the five decades, there was a significant decrease to 15%, 11% and only four % in the rates of paper, textiles and other. Besides that, the figure for glass and green waste consists of only nine % and five% during the period.
Looking at the remaining other types, the percentage of waste treated for plastic and metal, with just over eight % in 1960. But later, the figure for plastic increased considerably to 18%, compared to nine % in the figure for metal in 2011. Similarly, the percentage of waste processed for food and wood comprises twelve% and four% respectively in 1960. Followed by, the figure for food became the largest with 21%, compared to 18% in the rate of wood in 2011.