Shadowing Practice: Bill Gates - Population - Vaccines - Learn English Speaking with Video

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This equation has four factors, a little bit of multiplication.
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So you've got a thing on the left, CO2, that you want to get to zero.
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And that's going to be based on the number of people, the services each person's using on average, the energy on average for each service,
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and the CO2 being put out per unit of energy.
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So let's look at each one of these and see how we can get this down to zero.
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Probably one of these numbers is going to have to get pretty near to zero.
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That's back from high school algebra.
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But let's take a look.
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First, we've got population.
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The world today has 6.8 billion people.
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That's headed up to about 9 billion.
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Now, if we do a really great job on new vaccines, healthcare, reproductive health services, we could lower that by perhaps 10 or 15%.

About This Lesson

You're practicing English with "Bill Gates - Population - Vaccines" using the Shadowing technique — a method originally developed for professional interpreter training.

Focus on sounding like the speaker — not just repeating words. With 15–30 minutes of daily practice, you'll build real-world speaking confidence.

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 →