Dams
Hydropower dams are massive concrete walls placed inside rivers or streams to hold back water. Holes in the dam allow controlled amounts of water to pass through and as it moves through these holes, it passes through a machine, which converts that movement into electricity. Dams are incredible engineering marvels that represent one of the most beneficial and effective forms of electricity creation today.
First, dams positively impact the environment. Once constructed, these massive walls hold back tremendous amounts of water, forming artificial lakes. These lakes produce not only a wonderful habitat for fish but also a beautiful recreation area for local citizens, which serves to help the local population stay aware and respectful of nature. Additionally, through irrigation, these lakes bring to life millions of acres of ground that would otherwise lie barren.
Second, the power generated from a dam produces no harmful pollutants. This is in direct contrast to the dominant source of electricity production today—coal power plants, which are the leading cause of smog, acid rain, and air pollution. One large dam generates roughly the same amount of electricity as a typical coal plant. Consequently, dams, by replacing these plants, eliminate, among several other toxic pollutants, an average of 3.7 million tons of the global warming gas carbon dioxide per year.
Third, dams create no financial burden for the community. Because dams generate electricity and provide irrigation water for local agricultural concerns, they provide two means of bringing in revenue for owners. Combined, this revenue more than covers the significant expenses incurred during operation of the dam, resulting in significant profits. For example, the Grand Coulee Dam in Washington produces approximately 15 billion in revenue per year and requires only 5.7 billion in operating costs.
The article is mainly about dams. Dams are massive walls that are built to hold back water and used for producing electricity. The article states that dams have many advantages and provides three reasons for it. Conversely the lecturer believes that dams posit many drawbacks and more research is needed for construction of them and dismisses the author's reasons.
First, the article states that dams tend to form artificial lakes that provide wonderful habitat for fish and birds. However, the professor mentions that this reason is not accurate enough. Building dams may cause environment suffer. He states that during the procedure of building a dam, water has to be diverted and this threatens migrating fish's life. Furthermore, even after the water is returned to its original path, it usually flows slower than it used to be, and this is harmful for fish that their life depends on river's speed.
Second, the article claims that unlike the common sources of energy, coal and fossil fuels, generating electricity using dams produces no harmful pollutants. But the professor rejects this reason by stating that dam construction causes floods near the river, and this leads to accumulation of rubbish, destroying the vegetation in the river's path. In addition the pollutants tend to produce methane which is a greenhouse gas. Also removing the plants means more release of carbon dioxide. So the pollutants are still released.
Thirdly, the author states building dams has no financial burden for community. The professor dismisses this reason by stating that as he said earlier, dams lead to enormous floods in surrounding lands. So people who live in nearby have to be dislocated which is usually costly and unfeasible without government's aid, which has to paid from taxes, Therefore laying a burden on the society.
Grammar and spelling errors:
Line 1, column 213, Rule ID: SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA[1]
Message: Did you forget a comma after a conjunctive/linking adverb?
Suggestion: Conversely,
...ages and provides three reasons for it. Conversely the lecturer believes that dams posit m...
^^^^^^^^^^
Line 5, column 336, Rule ID: POSSESIVE_APOSTROPHE[2]
Message: Possible typo: apostrophe is missing. Did you mean 'rivers'' or 'river's'?
Suggestion: rivers'; river's
...bbish, destroying the vegetation in the rivers path. In addition the pollutants tend t...
^^^^^^
Line 5, column 352, Rule ID: SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA[2]
Message: Did you forget a comma after a conjunctive/linking adverb?
Suggestion: addition,
...g the vegetation in the rivers path. In addition the pollutants tend to produce methane ...
^^^^^^^^
Line 5, column 427, Rule ID: SENT_START_CONJUNCTIVE_LINKING_ADVERB_COMMA[1]
Message: Did you forget a comma after a conjunctive/linking adverb?
Suggestion: Also,
...duce methane which is a greenhouse gas. Also removing the plants means more release ...
^^^^
Line 5, column 445, Rule ID: POSSESIVE_APOSTROPHE[1]
Message: Possible typo: apostrophe is missing. Did you mean 'plants'' or 'plant's'?
Suggestion: plants'; plant's
... is a greenhouse gas. Also removing the plants means more release of carbon dioxide. S...
^^^^^^
Transition Words or Phrases used:
also, but, conversely, first, furthermore, however, if, may, second, so, still, therefore, third, thirdly, as to, in addition
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 13.0 10.4613686534 124% => OK
Auxiliary verbs: 1.0 5.04856512141 20% => OK
Conjunction : 11.0 7.30242825607 151% => OK
Relative clauses : 15.0 12.0772626932 124% => OK
Pronoun: 25.0 22.412803532 112% => OK
Preposition: 29.0 30.3222958057 96% => OK
Nominalization: 6.0 5.01324503311 120% => OK
Performance on vocabulary words:
No of characters: 1537.0 1373.03311258 112% => OK
No of words: 295.0 270.72406181 109% => OK
Chars per words: 5.21016949153 5.08290768461 103% => OK
Fourth root words length: 4.14434120667 4.04702891845 102% => OK
Word Length SD: 2.57773375077 2.5805825403 100% => OK
Unique words: 174.0 145.348785872 120% => OK
Unique words percentage: 0.589830508475 0.540411800872 109% => OK
syllable_count: 460.8 419.366225166 110% => OK
avg_syllables_per_word: 1.6 1.55342163355 103% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 2.0 3.25607064018 61% => OK
Article: 7.0 8.23620309051 85% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 3.0 1.51434878587 198% => OK
Preposition: 1.0 2.5761589404 39% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 17.0 13.0662251656 130% => OK
Sentence length: 17.0 21.2450331126 80% => The Avg. Sentence Length is relatively short.
Sentence length SD: 50.5807107947 49.2860985944 103% => OK
Chars per sentence: 90.4117647059 110.228320801 82% => OK
Words per sentence: 17.3529411765 21.698381199 80% => OK
Discourse Markers: 7.35294117647 7.06452816374 104% => OK
Paragraphs: 4.0 4.09492273731 98% => OK
Language errors: 5.0 4.19205298013 119% => OK
Sentences with positive sentiment : 3.0 4.33554083885 69% => OK
Sentences with negative sentiment : 6.0 4.45695364238 135% => 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: 0.145798000566 0.272083759551 54% => OK
Sentence topic coherence: 0.0499005658356 0.0996497079465 50% => OK
Sentence topic coherence SD: 0.0535825012968 0.0662205650399 81% => OK
Paragraph topic coherence: 0.0945513842916 0.162205337803 58% => OK
Paragraph topic coherence SD: 0.0294116082751 0.0443174109184 66% => OK
Essay readability:
automated_readability_index: 11.8 13.3589403974 88% => Automated_readability_index is low.
flesch_reading_ease: 54.22 53.8541721854 101% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 9.9 11.0289183223 90% => OK
coleman_liau_index: 12.64 12.2367328918 103% => OK
dale_chall_readability_score: 9.14 8.42419426049 108% => OK
difficult_words: 87.0 63.6247240618 137% => OK
linsear_write_formula: 6.0 10.7273730684 56% => Linsear_write_formula is low.
gunning_fog: 8.8 10.498013245 84% => OK
text_standard: 10.0 11.2008830022 89% => OK
What are above readability scores?
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Rates: 86.6666666667 out of 100
Scores by essay e-grader: 26.0 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.