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

Essay topics:

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

The charts compare, in percentage terms, five fuel sources used to produce
energy in the USA in 1980 and 1990.
Overall, oil was the main resource used for energy production in both years.
There was relatively little change in the proportions of the other fuel sources
used in 1980 and 1990.
In 1980, 42% of energy produced in the USA came from oil, but this then fell to 33% in 1990. The figures for natural gas, in contrast, remained almost stable at 26% of total energy production in 1980 and 25% in 1990. There was, however, a significant increase in the proportion of coal used as an energy source. From a figure of 22% in 1980, it then overtook natural gas in 1990, with 27%. While the figure for hydroelectric power remained constant at 5% of the total in both years, the percentage of nuclear power used to produce energy rose by 5% from the 1980 figure, to reach 10% in 1990.

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Average: 5.6 (1 vote)
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Comments

Grammar and spelling errors:
Line 16, column 1, Rule ID: ENGLISH_WORD_REPEAT_BEGINNING_RULE
Message: Three successive sentences begin with the same word. Reword the sentence or use a thesaurus to find a synonym.
...d one, at 27% ten years later. In terms of nuclear power, the figure in 1...
^^

Transition Words or Phrases used:
but, second, so, still, third, while, in contrast

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

Performance on Part of Speech:
To be verbs : 6.0 7.0 86% => OK
Auxiliary verbs: 0.0 1.00243902439 0% => OK
Conjunction : 5.0 6.8 74% => OK
Relative clauses : 2.0 3.15609756098 63% => OK
Pronoun: 1.0 5.60731707317 18% => OK
Preposition: 28.0 33.7804878049 83% => OK
Nominalization: 3.0 3.97073170732 76% => OK

Performance on vocabulary words:
No of characters: 718.0 965.302439024 74% => OK
No of words: 148.0 196.424390244 75% => More content wanted.
Chars per words: 4.85135135135 4.92477711251 99% => OK
Fourth root words length: 3.48791127476 3.73543355544 93% => OK
Word Length SD: 2.56763869034 2.65546596893 97% => OK
Unique words: 95.0 106.607317073 89% => More unique words wanted.
Unique words percentage: 0.641891891892 0.547539520022 117% => OK
syllable_count: 195.3 283.868780488 69% => OK
avg_syllables_per_word: 1.3 1.45097560976 90% => OK

A sentence (or a clause, phrase) starts by:
Pronoun: 0.0 1.53170731707 0% => OK
Article: 4.0 4.33902439024 92% => OK
Subordination: 1.0 1.07073170732 93% => OK
Conjunction: 0.0 0.482926829268 0% => OK
Preposition: 6.0 3.36585365854 178% => OK

Performance on sentences:
How many sentences: 7.0 8.94146341463 78% => Need more sentences. Double check the format of sentences, make sure there is a space between two sentences, or have enough periods. And also check the lengths of sentences, maybe they are too long.
Sentence length: 21.0 22.4926829268 93% => OK
Sentence length SD: 41.4896102067 43.030603864 96% => OK
Chars per sentence: 102.571428571 112.824112599 91% => OK
Words per sentence: 21.1428571429 22.9334400587 92% => OK
Discourse Markers: 7.0 5.23603664747 134% => OK
Paragraphs: 4.0 3.83414634146 104% => OK
Language errors: 1.0 1.69756097561 59% => OK
Sentences with positive sentiment : 4.0 3.70975609756 108% => OK
Sentences with negative sentiment : 0.0 1.13902439024 0% => More negative sentences wanted.
Sentences with neutral sentiment: 3.0 4.09268292683 73% => OK
What are sentences with positive/Negative/neutral sentiment?

Coherence and Cohesion:
Essay topic to essay body coherence: 0.134560898199 0.215688989381 62% => OK
Sentence topic coherence: 0.0746144161053 0.103423049105 72% => OK
Sentence topic coherence SD: 0.121112442867 0.0843802449381 144% => OK
Paragraph topic coherence: 0.115034206039 0.15604864568 74% => OK
Paragraph topic coherence SD: 0.144297557086 0.0819641961636 176% => OK

Essay readability:
automated_readability_index: 12.0 13.2329268293 91% => Automated_readability_index is low.
flesch_reading_ease: 75.54 61.2550243902 123% => OK
smog_index: 3.1 6.51609756098 48% => Smog_index is low.
flesch_kincaid_grade: 7.9 10.3012195122 77% => OK
coleman_liau_index: 10.85 11.4140731707 95% => OK
dale_chall_readability_score: 8.31 8.06136585366 103% => OK
difficult_words: 34.0 40.7170731707 84% => More difficult words wanted.
linsear_write_formula: 11.0 11.4329268293 96% => OK
gunning_fog: 10.4 10.9970731707 95% => OK
text_standard: 11.0 11.0658536585 99% => OK
What are above readability scores?

---------------------
More content wanted.
Minimum 150 words wanted.

Rates: 56.1797752809 out of 100
Scores by essay e-grader: 5.0 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.