The given bar chart demonstrates the amount of three different pollution sources, namely oil, coal, and gas measured in million tons in the United Kingdom from 1990 to 2010.
Overall, there was a considerable growth in the production of gas, whereas oil and coal experienced a downward trend. Although gas was the lowest data in 1990, it had accounted for the highest data over 20 years.
At the beginning of the period, the emission of gas stood at 220 million tons, 265 million tons, and 310 million tons, respectively. A decade later, the quantity of gas emission rose significantly to 300 million tons. Then the figure of gas gradually grew to 325 million tons in 2010. Moreover, gas had accounted for the highest data in the emissions from 2000 to 2010.
Regarding the oil-based and coal-fired emissions, both datasets were 275 million tons and 310 million tons, respectively. Afterwards, the level of oil exhaust fluctuated around 260 million tons in 2000 before decreasing to 210 million tons in 2010. After dropping steadily by 60 million tons a decade later, the releasing coal continued to decline under 200 million tons by the end of the presented span. In addition, the exhausted coal was the lowest data among the given figures over 10 years from 2000.