The line graph shows electricity production in New York using three different sources of power over a period of 20 years.
It is clear that petroluem power was by far the most important means of electricity generation over the period shown . Coal provided the lowest amount of eletricity during the remaining years after 1987.
In 1980 , petroluem power stations were the main source of electricity in New York, generating around 350 millions kilowatt hours of power. Coal power stations produced just above 200 millions kilowatt hours, and natural gas stations provided a negligible amount under 100 millions kilowatt hours. 5 years later , natural gas stations overtook coal energy production stations reaching 500 millions kilowatt hours at the of the given period.
After 1990, eletricity production from petroluem power rode dramatically to a peak of over 700 millions kilowatt hours. By contrast, the figure for coal energy stations fell to only about 200 millions kilowatt hours in 2000. Between 1995 and 2000 Natural gas stations saw a sharp rise to approximately 500 millions kilowatt hours by 2000