The given pie charts illustrate the amounts of different kinds of rubbish in a particular nation from 1960 to 2011.
Overall, most of categories witnessed a change in their amounts, except 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 in by 10%, 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, compared to the other genres, in 2011. Additionally, regarding food, wood, and metal categories, they were increasingly abolished over the period, accounting for 21 percent, 8 percent, and 9 percent, respectively. However, it seemed that people reduced wasting textilies by 8 percent and other genre by 5 percent in the same period.
In terms of the remaining cohorts, the proportions of green waste and glass remained unchanged at 9 percent and 5 percent, respectively, showing a stable disposing trend over the five-decade period.