The bar graphs illustrate information about the electricity generated using various sources of energy in billion kilowatt hours in the United States over a decade of time.
In 2009, it can be observed that non-renewable resources such as Coal has been used to generate a majority of 1756 billion kilowatt, while 921 billion kilowatts of Natural Gas has been exhausted to generate electricity, while Renewable Nuclear energy has been moderately used accounting to 437 and 799 respectively. Petroleum being the least used resource at 57 billion kilowatt. Conversely, in 2019, there is a dramatic increase in the usage of Natural Gas by 661 billion kilowatt-hours in comparison to 2009 at 1582. Coal and Nuclear resources have experienced a slight decline compared to 2009.
Diverging from this trend, the electricity generated by wind and hydroelectric energies stand at 300 and 273 billion kilowatt-hours in 2009. Now, solar, geothermal and plant/animal matter have been used the least in 2019 compared to 2009. Despite the drastic change in the usage of wind resource since 2009, hydroelectric power has remained the same over the decade staying at a constant of 273 billion kilowatt-hours.