The line graph depicts the changes of the amount produced in 3 typical types, which are Coal, Natural Gas and Petroleum in the UK over nearly two decades.
As can be seen from the graph, the upward trend was recorded in Petroleum and Natural gas, while the remaining witnessed the completely contrast state.
The data for Petroleum dramatically surged to exactly 140 energy units, levelling out until 1987, but them drasicall diving to 100 energy units in 1990 and remaining unchanged in the next 2 years. After no variation in data, that of Petroleum surprisingly increased and reached the peak at more than 140 energy units.
It is worth comparing the manufactoring levels of Cal and Natural gas. Initially, that of Coal almost doubled that of Natural gas, with 40 energy units. However, the amount of Coal manufactured decreased to 40 energy units, while that of Natural gas fluctuated arounf 41 energy units in the first decade. Also, the production level of Coal gradually fell and reached its lowest point at under 40 energy units; whereas, that of Natural gas performed the total opposite result, which eeached 100 at the end of the examined period.