The provided chart illustrates the recycling proportions of four different materials in a particular country over a period of 28 years, from 1982 to 2010.
Overall, paper and cardboard consistently had the highest recycling rate, fluctuating between 60% and nearly 80%, followed by glass containers with an increase from just above 40% to 70%, aluminum cans with a steady rise from 5% to 55%, and plastics with the lowest rate, fluctuating between 0-10%.
The recycling rates of paper and cardboard and glass containers showed significant changes throughout the years. Initially, both materials had relatively high recycling rates which gradually decreased for glass containers and increased for paper and cardboard until they reached their lowest points in 1990. Subsequently, paper and cardboard recycling decreased while glass containers’ recycling increased.
Aluminum cans began to be recycled in 1986 and consistently increased until they peaked in 2002. On the other hand, the recycling of plastics, which commenced in 1990, showed a relatively consistent increase, yet it never exceeded 10%. In summary, while aluminum cans and plastics demonstrated consistent growth over the years, glass containers and paper and cardboard experienced a change in trends after 1990.