The given pie charts illustrate the amounts of different kinds of rubbish in a particular nation from 1960 to 2011.
Overall, most of the categories witnessed a change in their amounts, except for green waste and glass. In addition, paper was the most frequently removed garbage in 1960, while over the next five decades, the first position belonged to food.
At the beginning, although the amount of disposed paper comprised a quarter of the total, it decreased significantly by 10 percent, while the opposite was true for plastic trash, which accounted for a small proportion of 8 percent in 1960 but experienced an enormous growth to 18 percent, becoming the most disposed waste in 2011, compared to the others. Additionally, regarding food, wood, and metal categories, these were increasingly discharged over the period, accounting for 21 percent, 8 percent, and 9 percent, respectively. However, it seemed that people reduced wasting textiles by 6 percent and the other rubbish by 8 percent in the same period.
In terms of the remaining types of trash the proportions of green waste and glass remained unchanged at 9 percent and 5 percent, respectively, showing a stable disposal trend over the five-decade period.