An illustration depicts the proportion of various categories of domestic rubbish that were recovered in a city over a decade, from 1992 to 2002.
Overall, we can see that almost all the rates of recycled products underwent a noticeable rise, except for cans. While the reproducing percentage of three materials (Plastic, Paper, and Glass) showed a dramatic growth over a decade, that of Cans declined in 1997; next, its rate grew again.
In 1992, the recovery percentages of the four materials, Plastic, Cans, Paper, and Glass, were approximately 10%, 18%, 13%, and 12%, respectively. Next, the 1997 statistics showed that the reproduction percentage of three domestic materials (Plastic, Paper, and Glass) saw a significant rise to 12%, 31%, and 28%, respectively, but the figure for the Cans dropped slightly by 5%, from 18% to 13% in 1997. Meanwhile, the recycling rate for three materials (Cans, Paper, and Glass) increased, roughly to 22%, 38%, and 48% in 2002. However, the statistics for Plastic remained similar to those in 1997.
