The bar chart illustrates how the recycling of five categories of domestic waste in a city has changed from 1992 to 2002.
Overall, all types of waste followed upward trends throughout the period, with glass being the leading source. Additionally, despite overall increasing, cans experienced a significant fall in 1997 while the plastic’s figures remained stable in 1997 and 2002.
Looking first at the higher figures, glass began at approximately 15% in 1997, which was negligibly higher than that of paper. Glass’s figure then rose steadily to over 30% in 1997 and nearly 50% in 2002, the highest figure in the chart. Paper followed a narrower pattern, standing at around 28% in 1997 and just under 40% by the end of the period.
The other categories were both much lower. The recycling of cans stood at about 18%, nearly double that of plastic, at merely 10%. The figure for cans then followed by a substantial dip to around 15% in 1997, before peaking at under 30% in 2002. Meanwhile, the most moderate growth was recorded in plastic, rising to about 12% in 1997 and remained unchanged until 2002.
