The proportions of four different materials that were recycled from 1982 to 2010 in a particular country

Question

The line chart compares 4 distinct materials in terms of recycling percentage in a country between 1982 and 2010.

It can be seen clearly that, the overall trend was upward, and there was no change in each position from 1982 to 2010. In particular, there were two of four types that experienced consistant increases, which were aluminium cans and plastics, while two other materials witnessed several downward trends during the shown period.

Paper & cardboard began the period with the highest of recycling rate, at over 65%, before climbing by 5% in 1986, and then decreased to its initial figure after 4 years. After experiencing a sharp improvement to about 80% in 1994, the figure dropped rapidly by 10% until the end of the period. By contrast, about half of the number of glass containers were recycled at the beginning of the period; however, this figure decreased significantly and hit the lowest point of 40% in the next 8 years before recovering remarkably to its initial proportion after 4 years. It then climbed less speedily to finish up in 2010 with the 2^nd recycling level of 60%.

Turning to alumininium cans, the recycling data for this material started in 1986, which was only 5%. It then skyrocketed solidly to 25% in 2002 before witnessing a more significant rise, ending the period with the 3^rd place of 45%. On the other hand, the figure for plastics appeared later in 1990 at only 3%. Despite a slight improvement after that, the proportion of recycled plastic only flattened out under 10% during the shown period, finished at over 9% in 2010.

Answer 1

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