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The given graph illustrates the recycling rates of four materials(paper, cardboard, glass container, aluminium cans and plastics) in a country from 1982 to 2010.(25) Overall, paper and cardboard rates were fluctuated over a span of 28 years whereas, glass container rates were decreased initially but later recovered. In contrast, aluminium cans increased steadily from 1982 to 2010. Finally, the proportion rates of plastic were relatively stable over the given years.(45) In 1982, the recycling proportion of paper and cardboard is around 65 percentage before it started to fluctuate over the years and ending at 70 percentage in the year 2010. The recycling rates of glass containers were quite low in 1982 when compared to that of paper and cardboard. In 1982, 50 per cent of the materials were recycled before they began to rise from 1990 to 2006. In contrast, these values were very low at first but gradually increased over the years contributing nearly 45 per cent. Finally, the recycling proportion of plastic is very low and it is relatively stable over the years contributing less than 10 per cent.