The given pie charts illustrated data on waste disposal of various categories in a nation in 1960 and 2011.
Overall, it can be seen that there was an increase in the proportion of plastic, wood and food disposal while people threw away less paper, textile and other types of waste. In addition, disposed metal, glass and green waste shared almost the same figure in two years.
In 1960, 25% of paper was discarded but this percentage fell by 10% in 2011. Regarding textile, this category also experienced a slight decline of 6% (from 17% to 11%) in the same time frame. Besides, the amount of other waste got rid of in 2011 was 3 times lower than that in 1960.
It is clear that the proportion of plastic and food waste grew by roughly 10% in 2011 compared to the other year. And people disposed of a two-fold amount of wood 51 years after 1960.
In terms of glass, metal and green waste, these types of disposal shared almost constant figure over the period. Specifically, the two latter types’ disposal were approximately 9% while the percentage of glass thrown away was only 5%.