The given line graph illustrates information about manufature levels of primary three various fuels namely petroleum, coal and natural gas by European countries between 1981 and 2000. The units are measured in tonnes
In summary, the rank of production in coal experienced a noticeable decrease, albeit with fluctuations over the entire timeframe, while natural gas increased significantly by end of the year. Of particular note is that, petroleum saved the highest grade among its counterparts at the same time.
In 1980, the fuel which manufactured the greatest grade was petroleum, at roughly 100 tonnes. Coal followed closely behind at 80 tonnes, while natural gas stood at same 40 tonnes. By 1985, petroleum had had an overwhelming rise to reach approximately 130 tonnes whereas the degree was largely reversed for the coal, which plummeted to about 50 tonnes, as for production rank of natural gas remained unchanged. Similarly, petroleum experienced a dramatic decline and returned to its initial level by 1990, while manufacture degree of coal reached 60 tonnes, albeit with notable climb, as well as figure no changed for natural gas again at the same time.
In comparison with the rank for natural gas, which increased noticeably from 40 in 1995 to just slightly over 80 tonnes by the final year, the degree for coal fallen insignificantly from 50 to 40 at the same time. By contrast, the production grade of petroleum dropped slightly to 120 in 2000, after increasing markedly from roughly 100 tonnes in 1992 to approximately 135 tonnes in 1998.