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Hello, this is 6 Minute English from BBC Learning English.

I'm Neil.

And I'm Sam.

We're talking about the environment in this program,

specifically climate change.

Now, Sam, what do you think is the biggest cause of climate change?

An obvious answer would be that climate change

is the result of carbon emissions caused by humans.

It's about people's carbon footprint.

The measurement of how much carbon dioxide is produced by someone's everyday activities.

That makes sense.

But recently, some scientists, especially in the West,

have been focusing on another issue.

The increasing number of people in the world,

something known as overpopulation.

In this program, we'll be discussing the controversial link

between overpopulation and climate change.

And as usual, we'll be learning some new vocabulary as well.

Sounds good, Neil.

But first, I have a question for you.

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