The bar chart demonstrates three types of sources that create gas leading to the greenhouse phenomenon in the UK over a period of 20 years.
Overall, the production of greenhouse gases coming from oil and coal decreased over time while the emission sources from gas rose significantly.
In 1990, coal was the main source of greenhouse gas in the UK, generating around 300 million tons. Gas and oil produced 275 million tons and 215 million tons respectively. Just 10 years later, the generation of gas overtook coal as the primary source of greenhouse gas.
Between 1990 and 2010, the figure for gas saw a dramatic rise and reached its peak of over 300 million tons at the end of the period. By contrast, the production of coal witnessed a downward trend to just nearly 200 million tons, being the least contribution to the greenhouse phenomenon among the three in the UK. Meanwhile, in the first five years, the generation of oil also decreased, but rose back to the same amount of its own at the beginning, then gradually fell again to approximately just over 200 million tons at the end of the period shown.