Air purifiers are being used to protect our health from air pollution. Many different types of air purifiers have been invented for better effects. Here are some of the most widely used air purifiers.
HEPA filters are effective at removing allergens such as dust or pollens without producing secondary pollution. The folded fiber sheets of the HEPA filters trap toxic substances when the absorbed particles come into contact with the fiber. Once any large enough particle is absorbed, the filter will produce cleaner air in an eco-friendly way.
Ozone-generating air purifiers remove unpleasant smells and airborne chemicals. This can be done with the help of ozone, which creates a special reaction when it comes in contact with hazardous substances. Also, ozone has a pleasant smell like air fresheners. These two features of ozone-generating filters appeal to many customers.
UV air purifiers directly react with the air and remove harmful bacteria in it. It is especially useful when removing harmful microscopic particles in the atmosphere. This results in a better environment to live in with cleaner air to breathe. Moreover, UV air filters operate so quietly that it is hard to hear them working.
The passage suggest the different types of purifiers used to protect our health from air pollution. Three different types of purifiers are mentioned in the passage with their use. But, the lecturer opposes these points by providing specific evidences.
Firstly, in the passage it is mentioned that HEPA filters can remove dust, pollens and also the filters in them can catch the large particles. But, the lecturer points out that the HEPA filters cannot get rid of small particles like allergents, viruses, bacterias whose size is less than 0.3 micrometer which have an adverse effect on our life. This small particles have tendency to grow and multiply which in-turn damages the quality of air.
Second type of purifiers are ozone-generating purifiers. In the passage, it is mentioned that ozone has a tendency to react with toxic substances. But the lecturer opposes it by saying that large proportion of ozone could be harmful to eyes, lung and skin. It can cause adverse effect to life though its only advantage is its pleasant smell.
The third type of purifiers is UV purifiers which removes harmful bacteria in it. But, the lecturer states that the UV purifier cannot remove hazardous gases, cigarette smoke and harmful fumes. This can be very dangerous as this gases have a high toxic particles which is not good for a cleaner air.
In conclusion, the passage suggest three different type of air purifiers with there merits. The lecturer opposes the facts mentioned in the passsage by providing evidences.
Grammar and spelling errors:
Line 1, column 13, Rule ID: MASS_AGREEMENT[2]
Message: Possible agreement error - use third-person verb forms for singular and mass nouns: 'suggests'.
Suggestion: suggests
The passage suggest the different types of purifiers used t...
^^^^^^^
Line 4, column 253, Rule ID: A_PLURAL[2]
Message: Don't use indefinite articles with plural words. Did you mean 'particle'?
Suggestion: particle
...ngerous as this gases have a high toxic particles which is not good for a cleaner air. I...
^^^^^^^^^
Transition Words or Phrases used:
also, but, first, firstly, if, second, so, third, in conclusion
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 10.0 10.4613686534 96% => OK
Auxiliary verbs: 7.0 5.04856512141 139% => OK
Conjunction : 5.0 7.30242825607 68% => OK
Relative clauses : 10.0 12.0772626932 83% => OK
Pronoun: 20.0 22.412803532 89% => OK
Preposition: 31.0 30.3222958057 102% => OK
Nominalization: 2.0 5.01324503311 40% => More nominalizations (nouns with a suffix like: tion ment ence ance) wanted.
Performance on vocabulary words:
No of characters: 1268.0 1373.03311258 92% => OK
No of words: 250.0 270.72406181 92% => More content wanted.
Chars per words: 5.072 5.08290768461 100% => OK
Fourth root words length: 3.97635364384 4.04702891845 98% => OK
Word Length SD: 2.57340241703 2.5805825403 100% => OK
Unique words: 132.0 145.348785872 91% => More unique words wanted.
Unique words percentage: 0.528 0.540411800872 98% => OK
syllable_count: 396.0 419.366225166 94% => OK
avg_syllables_per_word: 1.6 1.55342163355 103% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 4.0 3.25607064018 123% => OK
Article: 7.0 8.23620309051 85% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 1.0 1.51434878587 66% => OK
Preposition: 3.0 2.5761589404 116% => OK
Performance on sentences:
How many sentences: 15.0 13.0662251656 115% => OK
Sentence length: 16.0 21.2450331126 75% => The Avg. Sentence Length is relatively short.
Sentence length SD: 33.303987082 49.2860985944 68% => OK
Chars per sentence: 84.5333333333 110.228320801 77% => OK
Words per sentence: 16.6666666667 21.698381199 77% => OK
Discourse Markers: 4.2 7.06452816374 59% => More transition words/phrases wanted.
Paragraphs: 5.0 4.09492273731 122% => OK
Language errors: 2.0 4.19205298013 48% => OK
Sentences with positive sentiment : 3.0 4.33554083885 69% => OK
Sentences with negative sentiment : 3.0 4.45695364238 67% => OK
Sentences with neutral sentiment: 9.0 4.27373068433 211% => Less facts, knowledge or examples wanted.
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.327593397193 0.272083759551 120% => OK
Sentence topic coherence: 0.114014835098 0.0996497079465 114% => OK
Sentence topic coherence SD: 0.112993777102 0.0662205650399 171% => OK
Paragraph topic coherence: 0.189129415319 0.162205337803 117% => OK
Paragraph topic coherence SD: 0.0846092535773 0.0443174109184 191% => OK
Essay readability:
automated_readability_index: 10.8 13.3589403974 81% => Automated_readability_index is low.
flesch_reading_ease: 55.24 53.8541721854 103% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 9.5 11.0289183223 86% => OK
coleman_liau_index: 11.83 12.2367328918 97% => OK
dale_chall_readability_score: 7.46 8.42419426049 89% => OK
difficult_words: 48.0 63.6247240618 75% => More difficult words wanted.
linsear_write_formula: 10.5 10.7273730684 98% => OK
gunning_fog: 8.4 10.498013245 80% => OK
text_standard: 11.0 11.2008830022 98% => OK
What are above readability scores?
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Rates: 80.0 out of 100
Scores by essay e-grader: 24.0 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.