The two pie charts illustrate the percentage of waste disposal from various sources, categorized into: paper, green waste, metal, glass, plastic, wood, food, textiles, and others in a certain country during 1960 and 2011.
Overall, it can be seen that paper and food emerged as the main waste sources throughout the given period, while glass emits a smaller amount of waste. Notably, green waste and metal relatively remained stable from 1960 to 2001.
In 1960, the proportion of waste from paper led with 25%, accounting for a quarter of the total, followed by 17% and 12% of textiles and food, respectively. By contrast, the figures for waste disposal of green waste, metal, and plastic were lower, standing at 9% and 8%. Furthermore, glass and wood were the least common waste sources, making up merely 5% and 4%, respectively.
2011, there were significant variations across all categories. The percentage of waste from paper considerably decreased from 25% to 15% over 5 decades, followed by a decline from 17% to 11% of textiles. On the other hand, the waste disposal of food, wood, and plastic experienced an increasing trajectory, occupying 21%, 8%, and 18%, respectively. However, green waste and glass waste remained at 9% and 5% during the reported time. Furthermore, the proportion of waste from unspecified sources witnessed a plummet from 12% in 1960 to 4% in 2011.