The two pie charts illustrate the essential energy sources of the USA between the 1980s and the 1990s.
Overall
, oil is the largest contributor in two decades, Linking Words
whereas
Hydroelectric Power is the least important source. The energy sources may be changed because of the technology and natural resources.
On the one hand, oil provided the country with more energy than others, Linking Words
although
it decreased during these periods from 42 per Linking Words
cent
to 33 in the 1980 and 1990 respectively.Use synonyms
Moreover
, Hydroelectric Power helped a little the USA with 5 per Linking Words
cent
which did not change between these years. Use synonyms
Furthermore
, Nuclear Power is a minor source which was 5 per Linking Words
cent
in 1980 and rose to 10 per Use synonyms
cent
in 1990.
Use synonyms
On the other hand
, Natural Gas was the predominant supplier in the two terms. The use of it decreased slightly by 25 per Linking Words
cent
. Use synonyms
Additionally
, another crucial factor, Coal increased from 22 per Linking Words
cent
in 1980 to 27 per Use synonyms
cent
in 1990.Use synonyms
nezerli.x12