The pie chart ilustrates the most used electric energy source in the US.From the years 1970 and 1980.
Overall,the first chart shows that the major used source is Coal and the least is Nuclear energy in the year 1980 whereas the other chart demostrates that Coal is still the most used and the least used are two,Oil and Nuclear energy in the year 1980.
Furthermore,in the year 1980 we can observe that Nuclear energy is the least used in this year at 1 percent.Whereas Coal is the most used by 47 percent,next having Natural Gas at 24 percent,then Hydro energy at 16 percent and after it we have Oil in 12 percent being one of the least used.
Moreover,in the year 1980 we can see that the usage of energy sources has experienced spme changes,Coal stayed being the major energy source used at 51 percent,as second we still have natural gas but it has slightly decriased at 15 percent,as third we have Hydro who also has gone downward at 12 percent and as lasts we see Oil and Nuclear at 11 percent but we can witness that Nuclear has rose by 10 percent throughout the years.
