The two graphs show the main sources of energy in the USA in the 1980s and the 1990s.

Essay topics:

The two graphs show the main sources of energy in the USA in the 1980s and the 1990s.

The provided pie charts compare the primary sources of energy in the USA in the 1980s and 1990s.
As can be seen, the USA mainly relied on oil and natural gas in both given periods, while hydroelectric and nuclear power constituted only a small proportion. Initially, in 1980s, oil comprised 42 per cent of the main US energy source, while natural gas and coal consisted of 26 and 22 per cents, respectively; in the mean time, both hydroelectric and nuclear power were at 5 per cent each.
There had been substantial change in the values of some energy sources 10 years later in the USA. Particularly, the US energy industry became less rely on oil as a source of energy since this figure decreased significantly and it consisted of nearly third of all sources. In contrast, the value of nuclear power doubled reaching 10 per cent. Also, there had been slight changes in natural gas and coal as these values gained 1 and 5 per cents reaching 26 and 27 per cents, respectively.
The given infographics illustrate changes in the US energy sector over a 10-year period between 1980s and 1990s.

Votes
Average: 7.3 (1 vote)

Comments

Grammar and spelling errors:
Line 2, column 171, Rule ID: IN_1990s[1]
Message: The article is probably missing here: 'in the 1980s'.
Suggestion: in the 1980s
...ted only a small proportion. Initially, in 1980s, oil comprised 42 per cent of the main ...
^^^^^^^^
Line 3, column 487, Rule ID: WHITESPACE_RULE
Message: Possible typo: you repeated a whitespace
Suggestion:
...hing 26 and 27 per cents, respectively. The given infographics illustrate change...
^^^

Transition Words or Phrases used:
also, if, so, third, while, in contrast

Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments

Performance on Part of Speech:
To be verbs : 4.0 7.0 57% => More to be verbs wanted.
Auxiliary verbs: 1.0 1.00243902439 100% => OK
Conjunction : 11.0 6.8 162% => OK
Relative clauses : 0.0 3.15609756098 0% => OK
Pronoun: 6.0 5.60731707317 107% => OK
Preposition: 24.0 33.7804878049 71% => OK
Nominalization: 1.0 3.97073170732 25% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.

Performance on vocabulary words:
No of characters: 905.0 965.302439024 94% => OK
No of words: 191.0 196.424390244 97% => OK
Chars per words: 4.73821989529 4.92477711251 96% => OK
Fourth root words length: 3.71756304063 3.73543355544 100% => OK
Word Length SD: 2.71353735881 2.65546596893 102% => OK
Unique words: 105.0 106.607317073 98% => OK
Unique words percentage: 0.549738219895 0.547539520022 100% => OK
syllable_count: 270.0 283.868780488 95% => OK
avg_syllables_per_word: 1.4 1.45097560976 96% => OK

A sentence (or a clause, phrase) starts by:
Pronoun: 0.0 1.53170731707 0% => OK
Interrogative: 0.0 0.114634146341 0% => OK
Article: 5.0 4.33902439024 115% => OK
Subordination: 3.0 1.07073170732 280% => Less adverbial clause wanted.
Conjunction: 0.0 0.482926829268 0% => OK
Preposition: 3.0 3.36585365854 89% => OK

Performance on sentences:
How many sentences: 8.0 8.94146341463 89% => OK
Sentence length: 23.0 22.4926829268 102% => OK
Sentence length SD: 48.8876262463 43.030603864 114% => OK
Chars per sentence: 113.125 112.824112599 100% => OK
Words per sentence: 23.875 22.9334400587 104% => OK
Discourse Markers: 4.875 5.23603664747 93% => OK
Paragraphs: 4.0 3.83414634146 104% => OK
Language errors: 2.0 1.69756097561 118% => OK
Sentences with positive sentiment : 8.0 3.70975609756 216% => Less positive sentences wanted.
Sentences with negative sentiment : 0.0 1.13902439024 0% => More negative sentences wanted.
Sentences with neutral sentiment: 0.0 4.09268292683 0% => More facts, knowledge or examples wanted.
What are sentences with positive/Negative/neutral sentiment?

Coherence and Cohesion:
Essay topic to essay body coherence: 0.235228936492 0.215688989381 109% => OK
Sentence topic coherence: 0.122613443672 0.103423049105 119% => OK
Sentence topic coherence SD: 0.107869375299 0.0843802449381 128% => OK
Paragraph topic coherence: 0.187038468714 0.15604864568 120% => OK
Paragraph topic coherence SD: 0.101839164328 0.0819641961636 124% => OK

Essay readability:
automated_readability_index: 12.8 13.2329268293 97% => OK
flesch_reading_ease: 65.05 61.2550243902 106% => OK
smog_index: 8.8 6.51609756098 135% => OK
flesch_kincaid_grade: 9.9 10.3012195122 96% => OK
coleman_liau_index: 10.51 11.4140731707 92% => OK
dale_chall_readability_score: 7.92 8.06136585366 98% => OK
difficult_words: 38.0 40.7170731707 93% => OK
linsear_write_formula: 14.0 11.4329268293 122% => OK
gunning_fog: 11.2 10.9970731707 102% => OK
text_standard: 11.0 11.0658536585 99% => OK
What are above readability scores?

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Rates: 73.0337078652 out of 100
Scores by essay e-grader: 6.5 Out of 9
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Note: the e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.