The line graph provides information on the usage of four main types of fuel – wood, coal, oil, and gas – between 1800 and 2000.
Overall, the majority of fuel types rose between 1800 and 2000, though the extent of change varied considerably. Notably, wood experienced the greatest change, falling by the largest margin over the period.
In 1800, there were two types of fuel available, wood and coal. Wood was the primary source of fuel, which recorded the highest rate of usage throughout (100%). Over time, It slowly lose popularity because of the coal, which gradually increased to an opposite direction. By 1900, coal accounted for the largest fuel usage, the leading fuel type by a considerable margin – at 70%, approximately a three quarters of all fuels. Wood followed in second place, constituting more than a quarter at 30%.
The twentieth century started with an addition of two fuel types – oil and gas – and also with notable decline in coal usage. Both new types initially recorded similar growth pattern, but gas was slightly less popular, recording a modest 20% whereas oil was responsible for 30% by the end of the next five decades. Finally, coal usage fall, narrowing the gap between fuel types, and thus three remaining fuels shared similar proportions at 33%. Wood trailed all others, without any usage as a fuel by the end of the period.