Band 9: The graph shows the percentage of four different types of fuels in use between the years 1800 and 2000. Summarize the information by describing the main features of the graph and making comparisons where appropriate.

The line graph illustrates the proportion of four types of fuel (wood, coal, oil and gas) used worldwide between 1800 and 2000.

Overall, there was a clear shift from traditional to modern energy sources. Wood usage declined dramatically over the period, while coal rose to a peak before falling. In contrast, oil and gas became increasingly important in the 20th century.

In 1800, wood was the dominant fuel, accounting for almost 100% of usage. However, its share decreased steadily, dropping to around 50% by the mid-19th century and falling to nearly zero by 2000. Meanwhile, coal usage increased rapidly from 0% in 1800 to approximately 70% in 1900, making it the leading fuel at that time. After reaching its peak, coal consumption gradually declined to about 30% by the end of the period.

Oil and gas, on the other hand, were negligible before 1900. Oil began to rise sharply in the early 20th century and reached roughly 35% by 2000. Similarly, gas showed a steady increase, ending at a level comparable to oil.

In conclusion, the graph highlights a transition from wood to coal, followed by the growing importance of oil and gas in modern energy consumption.