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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 chart provide information about the proportion of good chemical quality in river water in four countries from 1990 to 2002
It can be seen from the chart that there was a considerable fluctuation in river water in England and Scotland while that of Wale and Northern Ireland remained stable over most of the period.
Starting from over 40% in 1990, the quality of England’s water river then rose gradually to reach its peak at nearly 70% after 15 years before a sudden drop to 30% in 1998. However, it recovered to the end of the period at 50%. Likewise, there was a consistent increase in the river water quality in Scotland from just over 20% to nearly 60% in 2000 prior to declining marginally by 20% after two years.
By contrast, the proportion of water quality in Wales and Scotland stayed constant from 1990 to 1998, at 95% and 89% respectively. However, in the following years, while the former underwent a marginal decline to 80%, the latter climbed to 92% in 2000 and leveled off at the end of the period.
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