Please Review and Score My IELTS Essay

Topic: The graph below shows the proportion of four different materials that were recycled from 1982 to 2010 in a particular country. Summarize the information by selecting and reporting the main features, and make comparisons where relevant.

My essay:

The line graph shows the recycling percentage of paper & cardboard, glass containers, aluminum cans and plastic in one country between 1982 and 2010.

In 1982, about 65% of paper & cardboard was recycled. This figure fluctuated from then to 1990 and reached its highest rate in 1992 at 80%. However, from then on, the graph decreased at a constant rate to a level of 70% in 2010. In 1982, half of the glass containers was recycled; after dumping to its bottom at 40% in 1988, the figure followed an upward trend: it reached back to 50% in 1992 and then gradually increased until reached its top at 60% in 2010.

Aluminum cans were first recycled in 1984 at a rate of 5%. Between 1984 and 2010, the figure climbed rapidly overtime. In 2010, almost half of the cans was recycled. Not until 1988 were plastics recycled; although the figure climbed constantly, the changing rate was very small: started at about 4% in 1988 and in 2010 it was about 8%.

Overall, although paper & cardboard has the highest recycling rate, its graph fluctuated during investigated period and had an upward trend. Meanwhile, other materials tended to increase in percentages overtime.