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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 chemicals in rivers in the UK from 1990 to 2002.
Overall, it is obvious that all the regions in the UK had a good chemical quality rise after 12 years, only Wales had this percentage down. Besides, the percentage of good chemical quality in Wales and Northern Ireland were quite high, in contrast to England and Scotland had a quite low percentage.
The river water quality of Wales and Northern Ireland had the same percentage at 95 in the first 8 years. After that, they experienced volatility about 91% before the data on Northern Ireland increased slightly and remained stable at 95% at the end of the period. In contrast, Wales had tended to decrease gradually to 80% in 2002.
Additionally, rivers in England commenced to rise gradually from roughly 42% in the first year to approximately 69% in 1996, after which it gradually downed to 30% in the next year before growing gradually in the last year. Scotland had the quite same percentage of quality of chemicals in England. It rose gradually and remained valuable at 30% in 1996 before jumped back at around 50% and for
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