The graph shows the amount of fossil fuel energy generated in Europe between 1981 and 2001.
The line graph compares the amount of energy produced from three types of fossil fuel in Europe from 1981 to 2001.
Overall, petroleum was the most important source in generating energy. Over the period, natural gas overtook coal as a source of energy production.
In 1981, 35 trillion units of energy was produced from petroleum. There was a gradual rise in the number of energy generated from petroleum from 1981 to 1990. Then, it slightly decreased to 39 trillion units in 1991. However, there was a sharp increase in energy from petroleum from 1992 to 2001. It reached to 50 trillion units in 2001.
Energy generated from coal was exactly 30 trillion units in 1981, but it constantly declined over the period. It was only 18 trillion units in 2001. In contrast, natural gas was used less than coal from 1981 to 1991, it was 8 trillion units and 20 trillion units respectively. However, in 1992 it overtook coal to become the second source of energy among three types of fossil fuels, with 22 trillion units. It steadily raised and reached to 32 trillion units at the end of period.