Prática de Shadowing: Plastic Isn’t The Problem You’ve Been Made To Believe - Aprenda a falar inglês com vídeo
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Plastic isn't the problem we've been told it is.
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We've been told it's this terrible stuff that won't naturally rot away
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and contaminate our environment for hundreds if not thousands of years.
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But recent research has made it increasingly clear that this just isn't so.
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The true stories both better and worse.
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I have a brief summary.
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Environmental protection organizations have preached for half a century that plastic degrades very, very slowly.
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The Worldwide Fund for Nature, for example, says that plastic bottles last 450 years.
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According to the United Nations Environment Program, it can take thousands or even tens of thousands of years for plastic to degrade.
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And according to Greenpeace, plastic never goes away.
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You may ask, indeed, I think you should ask, how do they know, given that plastic didn't become widely used until about a century ago?
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And haven't any of these people ever seen plastic garden furniture?
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You can basically see the stuff rotting away with your own eyes.
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So what's really going on?
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We think of plastic as the epitome of an artificial product, but I think that artificial is not a helpful terminology.
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We're part of nature and I don't see why something we produce is any less natural than what other living beings produce.
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I think it makes more sense to refer to plastic as man -made
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or human -made if you want to be politically super correct.
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Plastics made of long chains of molecules called polymers and primarily produced from fossil fuels.
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That makes it what chemists call organic.
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Though plastics that we use in everyday life almost always contain other chemicals, many inorganic, to add color or elasticity or stability.
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That's right, plastics often have other chemicals added to make them more durable.
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This already tells you that the idea that plastics don't decay is somewhat questionable.
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Indeed, we know today that plastics begin to break down into smaller and smaller fragments incredibly quickly,
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giving rise to micro and later nanoplastics that have now spread around the entire globe.
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When this was first reported in 1972 by Edward Carpenter and Kenneth Smith, Other scientists weren't just surprised.
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They were openly hostile.
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According to Carpenter, the colleagues thought that the paper should never have been published and he was told to stick to biology.
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They were perfectly right, though.
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Micro and nanoplastics are now to be found anywhere from the Sahara Desert to the Arctic to the oceans.
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We literally eat and breathe the stuff.
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Now, that plastic fragments doesn't mean that it entirely chemically decays,
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but it does effectively increase the surface of the plastic and that means it becomes much more susceptible to sunlight, abrasion and chemical reactions.
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The shedding of micro and nanoplastics happened surprisingly quickly.
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A 2016 researcher showed
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that it took less than two months for a plastic coffee cup to shed nanoparticles
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when in water and exposed to UV light.
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Last year then, a group from Northeastern University measured how fast these particles undergo photodegradation in water,
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that is, how fast the polymers break apart into carbon dioxide other gases and other organic and inorganic substances.
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They estimated that a polystyrene particle with about one millimeter diameter would need about five and a half years,
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whereas a polypropylene particle with merely 100 nanometers diameter would fall apart in about half a year.
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This is roughly compatible with a finding from 2024,
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which found that a millimeter -sized plastic particle takes about half a year to decompose in water illuminated by light.
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It's also roughly compatible with a 2026 study from a Chinese group
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that looked at the decay of thin sheets of polypropylene and found a half -life of about a month.
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These are all data for specific types of plastic under specific circumstances.
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They don't tell us, for example, what happens to trash buried in soil.
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But my takeaway is that it's probably not going to take 10 ,000s of years for plastic to decompose.
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Let me be clear that I'm not saying that plastic is not a problem.
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It very clearly is.
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It's terrible for birds and fish who swallow it and even if it dissolves, it leaves behind potentially toxic chemicals.
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I'm not saying that plastic is not a problem.
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I'm just saying that the problem isn't that plastic doesn't decay.
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Indeed, I'd go so far to say that it'd be better if it wouldn't decay, that'd make it easier to remove,
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and it'd keep the carbon stored.
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We have also known for a decade that some bacteria have evolved the ability to digest plastic.
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There's also been a story that mealworms can do this too, but this hasn't been independently reproduced and has remained somewhat controversial.
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In any case, seeing that plastics contain a lot of usable chemical energy,
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it seems likely to me that some soil microbes will soon learn to digest it.
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What about the health effects of ingesting microplastics?
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I went through this in a recent video.
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And to make a long story short, there's currently no convincing evidence that microplastics have detrimental health effects.
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This does not mean they have no health effects.
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It merely means that the evidence is weak or non -existent.
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The story
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that plastic could take tens of thousands of years to rot was widely spread despite not having any evidence behind it whatsoever.
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It's only now that we get to see the numbers.
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Unfortunately, it might just be that the myth will live longer than the plastic itself.
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I find it difficult to think about how much we've damaged our environment, but I feel much better since I have joined
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Planet Wild, because it shows me that together we can help nature recover.
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Planet Wild is a community -based environmental protection organization.
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They're funding the restoration of ecosystems to preserve our nature and wildlife by partnering with different organizations every month.
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I've been part of their community for years now, and I've been really impressed by their work.
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They document all their projects with video reports that you can find right here on YouTube, so you can see your impact right away.
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In their recent mission, they brought wildlife back to the city of Bristol by planting wetlands.
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This is a lovely example of the hands -on work that
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Planet Wild is doing.
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Joining Planet Wild is a simple yet effective way to help this planet.
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So if you want to do something that matters, join Planet Wild.
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You can contribute whatever amount feels right.
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And if you're one of the next 100 people to sign up using my code, I'll cover your first month.
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Just scan the QR code or click on the link in the description.
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And don't worry, you can cancel any time.
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If you want to see them in action first, watch their mission Restoring Wetlands.
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Thanks for watching.
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See you tomorrow.
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Vocabulário e dicas de fala para esta lição
Esta aula de conversação usa o vídeo “Plastic Isn’t The Problem You’ve Been Made To Believe”. As palavras que mais se repetem: plastic, planet, decay, chemical, Wild. Este vídeo tem 86 frases e 1136 palavras para praticar shadowing. A fala dura 7:14. O falante fala em ritmo natural, cerca de 157 palavras por minuto, próximo de uma conversa do dia a dia. Apenas 81% das palavras estão entre as 3.000 mais comuns do inglês, por isso o vocabulário é exigente.
Vocabulário principal deste vídeo
15 palavras do vídeo que vale a pena aprender, com pronúncia e significado:
| Palavra | Pronúncia | Significado |
|---|---|---|
| decay substantivo | /diˈkeɪ/ | deterioração, apodrecimento |
| particle substantivo | /ˈpɑɹtək(ə)l/ | partícula |
| microwave substantivo | /ˈmaɪkɹoʊˌweɪv/ | micro-onda |
| soil substantivo | /sɔɪl/ | solo |
| organic adjetivo | /ɔːˈɡænɪk/ | orgânico |
| merely advérbio | /ˈmɪəli/ | meramente, somente |
| roughly advérbio | /ˈɹʌf.li/ | rudemente, precariamente |
| wildlife substantivo | /ˈwaɪldlaɪf/ | fauna, vida selvagem |
| artificial adjetivo | /ˌɑː.tɪˈfɪʃ.əl/ | artificial |
| diameter substantivo | /daɪˈæmɪdɚ/ | diâmetro |
| compatible adjetivo | /kəmˈpæt.ə.bəl/ | compatível |
| digest verbo | /daɪˈd͡ʒɛst/ | digerir |
| polymer substantivo | /ˈpɑ.lɪ.mɚ/ | polímero |
| fragment substantivo | /ˈfɹæɡmənt/ | fragmento |
| naturally advérbio | /ˈnæt͡ʃ.(ə.)ɹə.li/ | naturalmente |
Phrasal verbs que você vai ouvir
| Palavra | Significado |
|---|---|
| go away verbo | sair, partir |
| sign up verbo | subscrever |
Gramática neste vídeo
As estruturas que o falante mais usa, com as palavras exatas do vídeo:
| Estrutura | No vídeo |
|---|---|
| Present perfect have/has + particípio passado — uma ação passada que ainda importa agora | we've been told · has made · have preached |
| Voz passiva be + particípio passado — o foco está no que acontece, não em quem faz | we've been told · have been published · be found |
Pronúncia para ficar de olho
O falante usa 31 contrações e formas reduzidas, como don't, I'm, isn't. Diga-as na forma curta, do jeito que você ouve.
- Os sons de “th”: thin /ˈθɪn/, breathe /bɹiːð/, myth /mɪθ/
- Os sons de “sh” e “zh”: artificial /ˌɑː.tɪˈfɪʃ.əl/, trash /tɹæʃ/, sheet /ʃit/, potentially /pəˈtɛnʃ(ə)li/, controversial /ˌkɑn.tɹəˈvɝ.ʃəl/
- Palavras longas — acerte a sílaba tônica: artificial /ˌɑː.tɪˈfɪʃ.əl/, diameter /daɪˈæmɪdɚ/, compatible /kəmˈpæt.ə.bəl/, naturally /ˈnæt͡ʃ.(ə.)ɹə.li/, primarily /ˈpɹaɪ.mə.ɹə.li/
Sons difíceis para falantes de português:
- Consoante final — sem acrescentar um “i” depois: organic /ɔːˈɡænɪk/, digest /daɪˈd͡ʒɛst/, fragment /ˈfɹæɡmənt/, sheet /ʃit/, contribute /kənˈtɹɪb.jut/
- /l/ final — a língua toca o céu da boca, não vira “u”: particle /ˈpɑɹtək(ə)l/, soil /sɔɪl/, artificial /ˌɑː.tɪˈfɪʃ.əl/, compatible /kəmˈpæt.ə.bəl/, controversial /ˌkɑn.tɹəˈvɝ.ʃəl/
- /h/ — um sopro suave, diferente do “r”: helpful /ˈhɛlp.fl̩/, whereas /(h)wɛɹˈæz/, hostile /ˈhɑstəl/, whatsoever /ˌ(h)wʌtsoʊˈɛvɚ/
Como praticar com este vídeo
- Ouça o vídeo inteiro uma vez sem falar e anote as palavras que você não conhece.
- Comece na velocidade 0,75×, faça shadowing frase por frase e volte à velocidade normal quando ficar fácil.
- Grave a sua voz e compare com o original, prestando atenção a palavras como decay, particle, microwave.
O que é a Técnica de Shadowing?
Shadowing é uma técnica de aprendizado de idiomas com base científica, originalmente desenvolvida para o treinamento de intérpretes profissionais. O método é simples, mas poderoso: você ouve áudio em inglês nativo e repete imediatamente em voz alta — como uma sombra seguindo o falante com 1-2 segundos de atraso. Pesquisas mostram melhora significativa na precisão da pronúncia, entonação, ritmo, sons conectados, compreensão auditiva e fluência na fala.