Shadowing Practice: Carbon Dioxide – Oxygen Cycle - Learn English Speaking with Video

Creating lesson...
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Every breath you take connects you to one of Earth's most important cycles, the carbon dioxide oxygen cycle.
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It's like our planet has its own breathing system, and it's happening all around us, every single day.
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Here's how it works.
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Humans and all land animals breathe in oxygen and breathe out carbon dioxide into the air.
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The same thing occurs for marine animals, like fish.
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But this exchange of gases occurs in water.
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But where does all that fresh oxygen come from?
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And what happens to all the carbon dioxide we release?
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The answer is photosynthesis, nature's amazing recycling system.
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On land, plants are like oxygen factories.
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Using the sunlight's energy, they take in the carbon dioxide that animals breathe out.
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Combine it with water from the soil to create glucose, basically plant sugar that feeds them.
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The incredible part?
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As they make their food, they release oxygen as a bonus gift to the rest of us.
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But here's what might surprise you.
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Most of our oxygen doesn't actually come from forests or land plants.
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It comes from the ocean.
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Tiny plant-like organisms, called phytoplankton, float throughout our oceans by the billions.
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They're so small, you need a microscope to see them.
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But they're photosynthesis superstars.
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These microscopic ocean plants work the same way as land plants,
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using the energy of sunlight and taking in carbon dioxide and water from their surroundings,
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to make food, and pumping out oxygen in the process.
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And because there are so many of them covering our vast oceans, phytoplankton produce about half of all the oxygen on Earth.
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This creates a perfect cycle.
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Animals use oxygen and produce carbon dioxide.
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Plants and phytoplankton use that carbon dioxide and produce oxygen.
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It's been working this way for millions of years, keeping our atmosphere balanced and our air clean to breathe.
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Thank you.

What You'll Learn

This video builds practical speaking skills for clear communication. You’ll practice explaining scientific processes—key for IELTS speaking practice—by breaking down the carbon dioxide-oxygen cycle into simple, conversational steps. You’ll also learn to connect ideas smoothly, using phrases like “But here's what might surprise you” to engage listeners. Plus, you’ll master describing cause-and-effect relationships, a critical skill for both daily conversations and formal tests.

Listen For These Sounds

The speaker uses connected speech that’s common in natural English. Notice how “it's like our planet” links to “it's like ourplanet” with a subtle glide between “our” and “planet.” Reductions like “they're so small” become “they're so sma-ll” with a shortened “small,” and “what happens to all” blends into “wha'happens to all.” These patterns are key to understanding fast, fluent speech—perfect for practicing with a shadowing site to mimic real-world listening.

Say It Like a Native

To mirror the speaker’s rhythm, stress key terms like “photosynthesis,” “phytoplankton,” and “balanced” to emphasize important ideas. Pause slightly before surprising facts, like “But here's what might surprise you,” to build anticipation. Use the shadowing technique by repeating the video line-by-line: focus on matching the speaker’s pace and rising intonation in questions (even implied ones, like “Where does all that fresh oxygen come from?”). This practice will improve your English pronunciation and make your speech sound more natural. For extra practice, use tools like shadowspeaks to record and compare your delivery—you’ll notice progress in no time.

What is the Shadowing Technique?

Shadowing is a science-backed language learning technique originally developed for professional interpreter training and popularized by polyglot Dr. Alexander Arguelles. The method is simple but powerful: you listen to native English audio and immediately repeat it out loud — like a shadow following the speaker with just a 1–2 second delay. Unlike passive listening or grammar drills, shadowing forces your brain and mouth muscles to simultaneously process and reproduce real speech patterns. Research shows it significantly improves pronunciation accuracy, intonation, rhythm, connected speech, listening comprehension, and speaking fluency — making it one of the most effective methods for IELTS Speaking preparation and real-world English communication.

Shadowing technique: read the full step-by-step guide →