Pratica di Shadowing: Listening Test 3. Part 4: Microplastics - Impara a parlare inglese con i video

Creazione lezione...
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Part 4.
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You will hear part of an environmental science lecture about microplastics.
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First, you have some time to look at questions 31 to 40.
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Now listen carefully and answer questions 31 to 40.
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In today's lecture, I'm going to be talking about microplastics.
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Microplastics are tiny pieces of plastic smaller than 5 mm in size.
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Recently, there's been a greater awareness that there are large quantities of plastic waste, big and small, in the environment.
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The amount of plastic waste in the oceans has received widespread attention,
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but far less is known about the effects of microplastics in freshwater and particularly in soil oil.
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Microplastics can enter the environment via a number of different sources.
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Threads and microfibres detach from synthetic clothing every time they're put in a washing machine,
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and these find their way into the water system.
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Other sources include big pieces of plastic waste that are already in the environment,
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and these break down into microscopic particles over a period of time.
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On a larger scale, factory waste is another route, as our tyres, which wear down as cars,
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lorries and so on, travel along road surfaces.
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We already understand some of the impacts of microplastics from studies involving fish and other animals.
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There is evidence that microplastics harm small creatures in a variety of ways, such as by damaging their mouths,
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or by impairing their ability to feed, for example when microplastics get lodged in their digestive system.
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Surprisingly, perhaps, it is likely that humans consume microplastics, as these have been detected in a wide range of food and drink products,
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including bottled water, as well as in water that comes direct from the tap.
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What's more, salt and many kinds of seafood have also been found to contain microplastics.
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However, it's important to underline that there is not yet conclusive proof that microplastics cause significant harm to people.
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In many countries, including here in the UK, there is legislation which prevents manufacturers from adding plastic microbeads to shower gels,
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facial cleansers and toothpaste.
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It is very difficult to accurately estimate the total amount of
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microplastic particles in the soil as they can be hard to detect
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but we do know they are carried in the air and deposited in the soil by rain.
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What's more many of the fertilizers used by both farmers and gardeners contain microplastics.
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A team from the Anglia Ruskin University in Cambridge has carried
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out a study of the effects of microplastics on the digestive tracts of earthworms.
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These worms, which live in topsoil, are an essential component of our agricultural system.
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By feeding on soil, they mix nutrients into it, thereby making it more fertile.
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The researchers set out to discover whether the introduction of microplastics into the soil
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and the subsequent ingestion of these by earthworms would impact soil quality and ultimately inhibit plant growth.
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The short answer was yes, it did.
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After placing three different types of microplastic particles into the soil, they planted perennial ryegrass.
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The particles of microplastic, which included biodegradable PLA and conventional high-density polyethylene,
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or HTPE, were then ingested by the earthworms in the soil.
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The result was that the worms lost weight rapidly.
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What's more, a lower percentage than normal of the ryegrass seeds germinated, and the researchers concluded
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that this was a direct result of the earthworms being unable to fulfil their normal role in making soil more fertile.
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The team also discovered that there was an increase in the amount of acid found in the soil,
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and this was attributed mainly to the microplastic particles from conventional HDPE plastic.
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The conclusions of the study make for very interesting reading.
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I've included the reference in the notes to give you at the end of this session.
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To summarise, the authors proposed the idea that we need to regard soil as we would regard any other process in nature.
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This means we should accept the implications of soil being dependent on decaying
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and dead matter constantly being passed through the bodies of earthworms.
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That is, when soil becomes impoverished by the presence of microplastics,
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not only ecosystems but also the whole of society are negatively impacted.
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That is the end of part four.
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Thank you.
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Obiettivi di parlato per questo video

Questo clip è perfetto per rafforzare la tua fluency e la capacità di seguire un discorso tecnico in inglese, come le lezioni scientifiche. Attraverso l'ascolto attivo, migliorerai la comprensione di concetti specifici (come i microplastiche) e imparerai a riprodurre frasi complesse con naturalezza. È un ottimo modo per superare la paura di parlare di argomenti "seri" e aumentare la confidenza nella comunicazione.

Banca di frasi riutilizzabili

  • "In today's lecture, I'm going to be talking about..." (Nellectura di oggi, parlerò di...)
  • "There is evidence that..." (C'è prova che...)
  • "What's more..." (Inoltre...)
  • "However, it's important to underline that..." (Tuttavia, è importante sottolineare che...)
  • "To summarise..." (Per riassumere...)

Queste espressioni sono utili in qualsiasi contesto, dalle presentazioni agli esami: imparale a memoria e usale nel tuo parlato!

Correggi i tuoi punti deboli

Questo video è ideale per esercitarti nel shadowspeak (o shadow speech), una tecnica che consiste nel ripetere immediatamente le frasi dopo l'oratore per migliorare la pronuncia inglese e il ritmo. Concentrati sulle parole con accento, come "microplastics" (microplastiche) o "biodegradable" (biodegradabile), e sulla pausa tra le frasi lunge. Nota come l'oratore usa l'intonazione per enfatizzare i punti chiave (es. "surprisingly, perhaps..."). Con la pratica, la tua pronuncia diventerà più naturale e tu riuscirai a seguire i discorsi a velocità normale senza sforzo.

Non dimenticare: imparare l'inglese con YouTube è semplice se usi i video come questo per esercitarti quotidianamente. Il shadowspeak è un modo veloce per vedere risultati: prova a ripetere il discorso per 5 minuti al giorno e noterai il cambiamento!

La grammatica di questo video

Le strutture che chi parla usa di più, con le parole esatte del video:

StrutturaNel video
Forma passiva be + participio passato — conta ciò che accade, non chi lo fais known · have been detected · been found
Present perfect have/has + participio passato — un’azione passata che conta ancora adessohas received · have been detected · have also been found

Cos'è la tecnica dello Shadowing?

Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.

Tecnica dello shadowing: leggi la guida completa passo dopo passo →