EigoPro 1級読解 — The Treachery of Permanence: Microplastics and the Paradox of Durability

When chemists first synthesised plastics, they prized their refusal to decay. A material that resisted rust, rot, and microbial appetite seemed an unambiguous triumph, liberating commerce from the perishability that had constrained it for millennia. Yet the very inertness that recommended plastic has, with a grim irony, become its most insidious liability. What does not biodegrade does not vanish; it merely fragments. Subjected to sunlight, friction, and the relentless churn of waves, plastic objects do not return to nature but shatter into ever-smaller shards, eventually yielding microplastics—particles minute enough to elude filtration and pervade the environment with uncanny thoroughness. The consequences of this fragmentation are only dimly apprehended. Microplastics have been detected in Arctic ice, in the rain that falls upon remote mountains, and, more disquietingly, in human blood, placentas, and lungs. Their ubiquity is not in dispute; their toxicity, however, remains maddeningly elusive. The particles may act as vectors, ferrying adsorbed pollutants and pathogens into tissues otherwise shielded from them, yet establishing causation amid such bewildering complexity has thwarted even meticulous researchers. We are, in effect, conducting an uncontrolled experiment upon ourselves, with no plausible mechanism for halting it. Herein lies the deeper indictment. The crisis is not an aberration but the logical culmination of a design philosophy that conflated durability with virtue while externalising the costs of disposal. To engineer indestructibility without contemplating an object's afterlife was a profound failure of imagination. Recycling, however well-intentioned, cannot reclaim particles already dispersed beyond retrieval; remediation presupposes a tractability that microplastics conspicuously lack. The sobering lesson is that permanence, untempered by foresight, is no gift at all. We have bequeathed to posterity a contaminant that will outlast the civilisation that begot it, indifferent to our belated remorse.

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この単元の問題を3問、解説つきで公開しています

1級 · 読解 · 全5問

問 1

Which statement best captures the central argument of the passage?

Microplastics have been conclusively proven to cause specific diseases in humans through identifiable biological mechanisms.
Plastic's prized durability has perversely transformed it into a pervasive contaminant that resists both detection and removal.
Plastic pollution is a recent problem caused chiefly by careless disposal rather than by the material's intrinsic properties.
Recycling technologies, if adequately funded, could reverse the dispersal of microplastics already in the environment.

Phrase

the very inertness that recommended plastic has, with a grim irony, become its most insidious liability

1級読解主旨把握論旨

⚡ひとことで

プラスチックの耐久性という長所が、皮肉にも除去困難な汚染源へと転じた、というのが論旨。

選択肢の解説Choice Analysis

「Plastic's prized durability has perversely transformed it into a pervasive contaminant that resists both detection and removal.」

正解

筆者は、腐敗しないという美点("the very inertness that recommended plastic")が最も陰険な負債("its most insidious liability")になったと論じている。プラスチックは消えずに微細片へと砕け、検出も除去も困難な汚染物質として遍在する。この皮肉こそが文章全体を貫く中心主張である。

「Microplastics have been conclusively proven to cause specific diseases in humans through identifiable biological mechanisms.」
= 微小プラスチックが特定の疾患を生物学的機構で引き起こすと立証されたとする説 ━ 本文は毒性が"maddeningly elusive"で因果関係の立証が研究者を阻んできたと述べており、証明済とは正反対。。
「Recycling technologies, if adequately funded, could reverse the dispersal of microplastics already in the environment.」
= 資金次第でリサイクルが分散済みの微小片を回収できるとする説 ━ 本文は"cannot reclaim particles already dispersed beyond retrieval"と明言し、回収不能を強調している。。
「Plastic pollution is a recent problem caused chiefly by careless disposal rather than by the material's intrinsic properties.」
= 汚染は素材の性質ではなく最近の杜撰な廃棄が主因とする説 ━ 本文は危機を"the logical culmination of a design philosophy"=設計思想の必然と位置づけ、不注意主因説を退ける。。

▦Collocation

パターン	意味	例
a grim irony	痛烈な皮肉	There is a grim irony in a life-saving drug becoming a deadly addiction.
become a liability	負債・重荷となる	Once an asset, the ageing factory has become a liability to the firm.
the central argument	中心的論旨	Critics misread the central argument of her controversial essay.
resist removal	除去に抵抗する	The stain proved stubborn and resisted every attempt at removal.
pervade the environment	環境に遍在する	A faint chemical odour seemed to pervade the entire laboratory.

❝例文

The author's central thesis is that durability and disposability were never reconciled.
筆者の中心的主張は、耐久性と廃棄可能性が決して両立されなかったという点にある。
What was once celebrated as a virtue is now condemned as a hazard.
かつて美徳と称賛されたものが、今や危険として非難されている。
The passage frames the crisis as inevitable rather than accidental.
本文はこの危機を偶発的ではなく必然的なものとして描いている。
Its insidious nature lies in being everywhere yet imperfectly understood.
その陰険さは、遍在しながらも十分に理解されていない点にある。

💡Tip · 覚えるコツ

主旨設問は、本文を貫く"皮肉(irony)"の構造—長所が短所に転じる—を捉えるのが鍵。極端に断定的な選択肢("conclusively proven")は誤答であることが多い。

問 2

According to the passage, why did early chemists value plastics?

Because plastics biodegraded harmlessly once their useful life had ended.
Because plastics were known to neutralise pollutants and pathogens on contact.
Because plastics could be cheaply recycled into new products without loss of quality.
Because plastics resisted decay and freed commerce from the perishability that had long limited it.

Phrase

liberating commerce from the perishability that had constrained it for millennia

1級読解詳細把握

⚡ひとことで

初期の化学者は、プラスチックが腐敗に抵抗し商業を可滅性の制約から解放した点を評価した。

選択肢の解説Choice Analysis

「Because plastics resisted decay and freed commerce from the perishability that had long limited it.」

正解

本文は、プラスチックが錆・腐敗・微生物の食害に抵抗し("resisted rust, rot, and microbial appetite")、何千年も商業を縛ってきた可滅性から解放した("liberating commerce from the perishability")と述べる。化学者はこの不変性を明白な勝利と見なした。よって腐敗抵抗が評価理由である。

「Because plastics could be cheaply recycled into new products without loss of quality.」
= 品質を損なわず安価に再生できたから評価したとする説 ━ 本文に再生容易性への言及はなく、むしろ"Recycling…cannot reclaim particles"と限界を述べる。。
「Because plastics biodegraded harmlessly once their useful life had ended.」
= 役目を終えると無害に生分解したから評価したとする説 ━ 本文は"What does not biodegrade does not vanish"=分解しないことを核心とし、正反対。。
「Because plastics were known to neutralise pollutants and pathogens on contact.」
= 汚染物質や病原体を接触で中和したから評価したとする説 ━ 本文では粒子は逆に汚染物質や病原体を運ぶ"vectors"として描かれており、中和とは矛盾する。。

▦Collocation

パターン	意味	例
resist decay	腐敗に抵抗する	Cedar wood naturally resists decay even in damp conditions.
liberate from	～から解放する	The new software liberated staff from tedious manual entry.
constrain for millennia	何千年も制約する	Geography had constrained trade between the regions for millennia.
an unambiguous triumph	紛れもない勝利	The vaccine's success was hailed as an unambiguous triumph.
microbial appetite	微生物の食害	Preservatives are added to thwart microbial appetite for the product.

❝例文

The material's resistance to rot was initially seen as a clear advantage.
その素材の腐敗への抵抗力は、当初は明確な利点と見なされた。
Perishable goods had long imposed strict limits on long
distance trade. — 可滅性の商品は、長らく長距離貿易に厳しい制約を課してきた。
Durability promised to release merchants from age
old spoilage. — 耐久性は、商人を古来の腐敗から解放すると約束した。
What seemed a triumph would later reveal a hidden cost.
勝利に見えたものが、のちに隠れた代償を露わにすることになる。

💡Tip · 覚えるコツ

詳細設問は本文の語句を言い換えた選択肢を選ぶ。"resisted rust, rot"→"resisted decay"、"perishability"→そのまま、という対応関係を確認するとよい。

問 3

What does the passage indicate about the toxicity of microplastics?

It remains difficult to establish, since proving causation amid such complexity has frustrated even careful researchers.
It is confined to the Arctic and to remote mountains, sparing the human body.
It is denied by most scientists, who regard the particles as biologically inert.
It has been firmly quantified and is now considered negligible for human health.

Phrase

their toxicity, however, remains maddeningly elusive

1級読解詳細把握

⚡ひとことで

遍在は確実だが、毒性は捉えどころがなく因果関係の立証が研究者を阻んでいる。

選択肢の解説Choice Analysis

「It remains difficult to establish, since proving causation amid such complexity has frustrated even careful researchers.」

正解

本文は遍在性は争われない一方、毒性は"maddeningly elusive"=苛立たしいほど捉えどころがないと述べる。複雑さの中で因果を確立することが"has thwarted even meticulous researchers"=入念な研究者すら阻んできた。したがって立証が困難というのが本文の趣旨である。

「It has been firmly quantified and is now considered entirely negligible for long-term human health outcomes.」
= 健康への影響は無視できると確定したとする説 ━ 本文は毒性が未解明("elusive")としており、無害と確定したとは述べていない。。
「It is denied by most scientists, who regard the particles as biologically inert.」
= 粒子は不活性で大半の科学者が毒性を否定するとする説 ━ 本文は粒子が汚染物質を運ぶ"vectors"たりうると示唆し、不活性とは見ていない。。
「It is confined to the Arctic and to remote mountains, sparing the human body.」
= 毒性は北極や遠隔地に限られ人体は免れるとする説 ━ 本文は"human blood, placentas, and lungs"に検出されたと明記し、人体を含む。。

▦Collocation

パターン	意味	例
establish causation	因果関係を立証する	Epidemiologists struggled to establish causation behind the outbreak.
remain elusive	捉えどころがないままだ	A cure for the disease has long remained elusive.
thwart researchers	研究者を阻む	Funding cuts thwarted researchers on the verge of a breakthrough.
act as a vector	媒介として働く	Mosquitoes act as a vector for several tropical diseases.
not in dispute	争いの余地がない	That the climate is warming is not in dispute among scientists.

❝例文

Ubiquity is one thing; demonstrable harm is quite another.
遍在性は一つの事柄であり、立証可能な害はまったく別の事柄だ。
Researchers cannot yet pin down a clear mechanism of damage.
研究者はまだ明確な損傷の機構を特定できていない。
The particles may carry pollutants into protected tissues.
粒子は汚染物質を保護された組織内へ運び込むかもしれない。
Complexity, not indifference, has stalled the science.
科学を停滞させたのは無関心ではなく複雑さである。

💡Tip · 覚えるコツ

"遍在(確実)"と"毒性(未解明)"を本文は明確に区別している。両者を混同させる選択肢に注意。"not in dispute"が掛かるのは遍在のみ。

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この単元の講義を見る 1級の単元一覧 1級の用語集

EigoPro 1級 読解 — The Treachery of Permanence: Microplastics and the Paradox of Durability

この単元の問題を3問、解説つきで公開しています

the very inertness that recommended plastic has, with a grim irony, become its most insidious liability

liberating commerce from the perishability that had constrained it for millennia

their toxicity, however, remains maddeningly elusive

EigoPro 1級読解 — The Treachery of Permanence: Microplastics and the Paradox of Durability