The provided line graph presents data on the production levels of the principal fuels in the United Kingdom from 1981 to 2000.
A significant upward trend is observed in the production of petroleum and natural gas, while coal production demonstrates a consistent decline throughout the period.
Initially, the production of petroleum exhibited a notable increase of approximately 40 million tonnes from 1981 to 1984, reaching 140 million tonnes. This output remained stable for the subsequent three years. However, a decline occurred between 1987 and 1990, where production fell sharply to 100 million tonnes in 1990. Following this decline, a gradual resurgence was evident, culminating in a peak of 160 million tonnes in 1999. In contrast, natural gas production demonstrated a steady increase, beginning at around 20 million tonnes in 1981. The production levels remained stable for the first six years before witnessing a progressive rise to about 100 million tonnes by the end of the period.
Conversely, coal production in the UK showcased a persistent downward trajectory throughout the entire time frame examined. Starting at 80 million tonnes in 1981, production plummeted sharply to 40 million tonnes by 1984. Although there was a brief recovery to 60 million tonnes in 1986, this was not sustained. From that point onwards, coal production continued to decline steadily, concluding the period at a mere 20 million tonnes. This stark contrast between the fossil fuels signifies a shift in energy production priorities within the UK, as evidenced by the marked change from coal reliance to increased natural gas and petroleum output.