Reply To: Several possible causes of the Little Ice Age
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(As record of) [unclear ] the Little Ice Age, there (has been)[grammatical error ] a long period of time
that [during which ] the Earth suffers [grammatical error ] [ from ] unusually harsh cold days. Here, the professor says [ /states that ] current research data (unlies the conjucture about)[ unclear ] how the Little Ice Age forms.
Firstly, it[unclear pronoun ] supposes the cold winters (may have been)[ grammatical error ] caused by the Gulf Stream
after[ as a result of/resulted from ] weird warm weather . Warm air renders graciers [spelling error ] melted and produces cold freshwater to cool the Earth down. But the professor casts doubt [ preposition error ] that the Gulf Stream only affect[grammatical error ] Europe and North America, which means it can’t[/fails to ] explain[ /elucidate ] the global chill. Secondly, another [ Another ] theory about volcanic eruption was promoted, which suggested[tense error ] the clouds of dust and sulfer[ spelling error ] induced by volcanoes cause[/be conducive to the onset of ] the Little Ice Age. However, if there was [ grammatical error/subjunctive ] enough clouds to affect the temperature, people would discover some visual symptom[ word form error ] like the color changing in snow. Without any relative report, the professor overthrows the[ his ] hypothesis again.
Thirdly, the reading part mentions the decrease of human population which accelerates trees’ growth[ wordy/unclear ] . With more trees growing, plants consumed a deluge of carbon dioxide. But it[ /this ] can[ tense error ] ’t be the reason, either
. Because[because ] experts find that there is no[ wrong word ] enough time for plants to grow so fast [ as ] to reduce such [gargantuan ] amount of greenhouse gas. What’s more, with the increase of human population following behind, the area of plants would become smaller [ diminish ] rapidly. So the final explanation is negated[ unclear ] .