The line graph details the production levels of three main kinds of fuel in the UK from 1981 to 2000, measured in millions of tons. Overall, the production of natural gas tended to increase quite rapidly from 1981 to 2000, however, the production of coal and petroleum were unstable during this time
Petroleum has always been the largest source of fuel, since 1981 to 2000, while oil production levels have remained fluctuating between 100 and 120 million tons. In 1981, coal was the second largest source of fuel production, with an output of 80 million tons. However, coal production levels have gradually declined. Finally, by 2000, coal production had reached the lowest level among the three major fuels.
While coal production declined steadily, natural gas production never decreased during this period. Natural gas, which overtook coal at 50 million tons, rose and eventually becoming the only rising fuel in the final stretch.
In the end, petroleum still held the largest production , but natural gas rose to second place and pushed coal to account for the lowest production in 2000