The article contrasts Internal combustion engines with the hydrogen-based fuel-cell engine which can be used as a main source of power for cars. The author gives the advantages of hydrogen fuel cells over IC engines. However, the professor in the lecture refutes the author's claims.
Firstly, the article says that IC engines need petroleum, which is a finite source and one day we may end up without petroleum. On the other hand, fuel-cell engines don't encounter this scarcity problem, asserts the author, because it relies on hydrogen which can be produced from plenty of sources. However, the professor refutes this claim. She says it is not easy to produce hydrogen though it is available in many common sources like water. This is because fuel-cells need hydrogen as an artificial substance in pure liquid form, which is difficult to produce and store. In addition, explains the speaker, liquid hydrogen has to be stored in minus 253 degrees Celsius and it requires sophisticated laboratory cooling technology to achieve this. So, fuel-cell engines are not practical and easily available.
Secondly, the article says that IC engines are responsible for polluting the environment. Since it operates by burning petroleum which produces carbon dioxide and this compound harms the environment, whereas hydrogen fuel-cells don't pollute because the only by-product is water, which is not harmful. The speaker, in contrast, says in order to produce hydrogen fuel-cells, that is, to produce pure hydrogen from water and natural gas requires high energy, which is obtained by burning oil and coal, which produces carbon dioxide, thus harming the environment. She also says that the factories which produce hydrogen fuel cells are a great threat to the environment though the cars that run on fuel cells will not pollute.
Finally, the article says it is economically feasible to operate hydrogen fuel-cell engines because it is two times efficient than the IC engines. Hence, one can travel twice with the same amount of fuel with hydrogen fuel-cell engine cars when compared to IC engines cars. The speaker, on the contrary, disagrees that it is really inexpensive. She says hydrogen fuel-cells require platinum metal, which is expensive and rare. This platinum alone suits these fuel cells and it cannot be replaced with any other metal. Hence this adds up the price and makes the hydrogen fuel-cells expensive.
Because of the above reasons, the speaker disagrees that hydrogen fuel-cells are easily available, economic friendly and cheap in contrast to what author claims in the article.
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Grammar and spelling errors:
Line 3, column 166, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: don't
...m. On the other hand, fuel-cell engines dont encounter this scarcity problem, assert...
^^^^
Line 3, column 688, Rule ID: NEEDS_FIXED[1]
Message: "requires sophisticated" is only accepted in certain dialects. For something more widely acceptable, try 'sophisticating' or 'to be sophisticated'.
Suggestion: sophisticating; to be sophisticated
...nus 253 degrees Celsius and it requires sophisticated laboratory cooling technology to achiev...
^^^^^^^^^^^^^
Line 5, column 229, Rule ID: EN_CONTRACTION_SPELLING
Message: Possible spelling mistake found
Suggestion: don't
...nvironment, whereas hydrogen fuel-cells dont pollute because the only by-product is ...
^^^^
Line 7, column 519, Rule ID: SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA[1]
Message: Did you forget a comma after a conjunctive/linking adverb?
Suggestion: Hence,
...annot be replaced with any other metal. Hence this adds up the price and makes the hy...
^^^^^
Transition Words or Phrases used:
also, finally, first, firstly, hence, however, if, may, really, second, secondly, so, thus, whereas, as to, in addition, in contrast, in contrast to, on the contrary, on the other hand
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 21.0 10.4613686534 201% => Less to be verbs wanted.
Auxiliary verbs: 8.0 5.04856512141 158% => OK
Conjunction : 11.0 7.30242825607 151% => OK
Relative clauses : 18.0 12.0772626932 149% => OK
Pronoun: 28.0 22.412803532 125% => Less pronouns wanted
Preposition: 44.0 30.3222958057 145% => OK
Nominalization: 7.0 5.01324503311 140% => OK
Performance on vocabulary words:
No of characters: 2191.0 1373.03311258 160% => OK
No of words: 413.0 270.72406181 153% => Less content wanted.
Chars per words: 5.30508474576 5.08290768461 104% => OK
Fourth root words length: 4.50803742585 4.04702891845 111% => OK
Word Length SD: 2.64657217603 2.5805825403 103% => OK
Unique words: 206.0 145.348785872 142% => OK
Unique words percentage: 0.498789346247 0.540411800872 92% => More unique words wanted or less content wanted.
syllable_count: 679.5 419.366225166 162% => OK
avg_syllables_per_word: 1.6 1.55342163355 103% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 6.0 3.25607064018 184% => OK
Article: 10.0 8.23620309051 121% => OK
Subordination: 3.0 1.25165562914 240% => Less adverbial clause wanted.
Conjunction: 0.0 1.51434878587 0% => OK
Preposition: 7.0 2.5761589404 272% => Less preposition wanted as sentence beginnings.
Performance on sentences:
How many sentences: 21.0 13.0662251656 161% => OK
Sentence length: 19.0 21.2450331126 89% => OK
Sentence length SD: 54.3546346125 49.2860985944 110% => OK
Chars per sentence: 104.333333333 110.228320801 95% => OK
Words per sentence: 19.6666666667 21.698381199 91% => OK
Discourse Markers: 8.7619047619 7.06452816374 124% => OK
Paragraphs: 5.0 4.09492273731 122% => OK
Language errors: 4.0 4.19205298013 95% => OK
Sentences with positive sentiment : 8.0 4.33554083885 185% => OK
Sentences with negative sentiment : 5.0 4.45695364238 112% => OK
Sentences with neutral sentiment: 8.0 4.27373068433 187% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.557885222249 0.272083759551 205% => OK
Sentence topic coherence: 0.196689698467 0.0996497079465 197% => OK
Sentence topic coherence SD: 0.131781880476 0.0662205650399 199% => OK
Paragraph topic coherence: 0.351892421635 0.162205337803 217% => OK
Paragraph topic coherence SD: 0.0975846748059 0.0443174109184 220% => More connections among paragraphs wanted.
Essay readability:
automated_readability_index: 13.4 13.3589403974 100% => OK
flesch_reading_ease: 52.19 53.8541721854 97% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 10.7 11.0289183223 97% => OK
coleman_liau_index: 13.52 12.2367328918 110% => OK
dale_chall_readability_score: 8.63 8.42419426049 102% => OK
difficult_words: 106.0 63.6247240618 167% => OK
linsear_write_formula: 7.5 10.7273730684 70% => OK
gunning_fog: 9.6 10.498013245 91% => OK
text_standard: 14.0 11.2008830022 125% => OK
What are above readability scores?
---------------------
Write the essay in 20 minutes.
Rates: 73.3333333333 out of 100
Scores by essay e-grader: 22.0 Out of 30
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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.