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The image consists of a line graph titled "River Water Quality in the UK," depicting the percentage of river water with good chemical quality from 1990 to 2002 across four regions: Wales, Northern Ireland, England, and Scotland. In 1990, Wales had 75%, Northern Ireland had 45%, England had 70%, and Scotland had 80%; in 1992, Wales had 75%, Northern Ireland had 45%, England had 65%, and Scotland had 85%; in 1994, Wales had 85%, Northern Ireland had 45%, England had 75%, and Scotland had 90%; in 1996, Wales had 85%, Northern Ireland had 65%, England had 85%, and Scotland had 85%; in 1998, Wales had 90%, Northern Ireland had 45%, England had 85%, and Scotland had 85%; in 2000, Wales had 95%, Northern Ireland had 55%, England had 85%, and Scotland had 85%; in 2002, Wales had 95%, Northern Ireland had 65%, England had 90%, and Scotland had 80%.
Given the complexity of the image, the above description may not be entirely accurate.
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The line graph illustrates the proportion of the quality of chemical in rivers in the UK from 1990 to 2002
Overall, it is apparent that there was a considerable fluctuation in river water in England and Scotland while that of Wales and Northern Ireland remained unchanged over most of the period.
Starting from around 45% in 1990, the quality of water rivers in England went up steadily to reach its highest point at nearly 70% over a 6-year period before a sudden drop to 30% in 1998. However, it recovered to the end of the period at nearly 50%. Meanwhile, there was a significant increase in the quality of river waters in Scotland from just over 20% to 60% over a 10-year period from 1990 to 2000 before declining to 40% after two years.
On the other hand, the proportion of water quality in Wales and Northern Ireland reached a plateau of 95% and 85% respectively from 1990 to 1998. However, in the following years, Wales witnessed a sudden drop to 80% while Northern Ireland climbed to 95% in 2000 and maintained that value until the end of the period.
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