The pie charts compare the amount of electricity produced from different sources in the US between 1970 and 1980.
Overall, it is clear that the highest percentage of electricity was produced from coal, while the percentage of electricity produced from nuclear was the lowest in the US in the given years.
In terms of sources, in 1970, 47% of electricity was produced from coal, which increased slowly to 51% in 1980 in the US. An increase of 10%, from 1% to 11%, in electricity produced from nuclear occurred from the year 1970 to 1980; it was the lowest of all sources.
For the remaining sources, in 1970, 24% of electricity was produced from natural gas, and it decreased to 15% in the year 1980. 12% of electricity was produced from oil in 1970, which was almost stable at 11% in 1980. A decrease of 4%, from 16% to 12%, in electricity produced from hydro occurred between 1970 and 1980 in the US.
