the graph shows the percentage of four different types of fuels

The line graph demonstrates global usage of four most common types of fuels in the world. The data is provided in percents for a two centuries spat starting at 1800. Overall, utilizing in almost all of these sources of fuels became more required throughout the whole period. However, a significant reduction was the case in the usage of the wood during the years. Between 1900 and 2000 the demand for the new types of fuels oil and gas steadily grew from 0 till 35 during the last 100 year. The consumption of coal index peaked until 70 in 1900 from its initial o. Neverthless, this was followed by a slight reduction until the final 35. Remarkably, utilizing of the wood figure dramatically decreased from 100 in 1800 till 0 in 2000 correspondingly