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Phong: OK, shall we start discussing our assignment? It's a group presentation, isn't it?

Chi: Yes. Each group has to give a presentation about what life will be like in our city in the year 2050.

Ha: That's an interesting topic, but it's very broad. The first thing to decide is whether life will be better or worse.

Phong: I believe it'll be better because of modern technology.

Chi: Well... this won't be the main reason. I think we'll have better lives because there'll be no pollution. So, our city will be sustainable and more liveable.

Ha: You mean it'll be environmentally friendly, won't it?

Chi: Exactly. What do you think, Phong?

Phong: I like your ideas, but we can't include them all in our presentation. We should focus on either modern technology or the environment. We'll have only ten minutes, won't we?

Ha: That's right. I suggest that we should choose the environment. We can talk about solar energy, which will be used for transport in the future.

Chi: Good ideas, Ha. If we use more solar energy, the air will become cleaner and our health will be better. People can develop health problems and become ill if they breathe polluted air.

Phong: OK, let's focus on the environment. We can also discuss other uses of solar energy – not just for transport.

Chi: Sorry … I'm not familiar with those. Can you explain them?

Phong: Solar energy can also be used for day lighting, cooking, heating water, and helping plants grow. If we have solar panels on our roofs, we'll be able to generate our own electricity.

Ha: Great ideas. What do you think, Chi? Phong presented them so well, didn't he?

Chi: Yes, he did. I understand what he means. If people use renewable energy, their impact on the environment is less.

Ha: I think we've got a few points for our presentation now. We can start preparing the slides. Phong, you will do the talking, won't you?

Phong: No problem. Let me know if you need anything else.