Ответ:

- Hi, Peter!

- Hi, Tanya!

- How are you?

- I am fine. And you?

- I am fine, thank you

- Do you know about the problems in our world?

- Which problems?

- I'm worried about water pollution.

- Oh, got it! I find this problem (very) worrying. I think, people are very stranger!

- Why?

- Because they build factories, throw garbage into rivers, sea and lakes.

- Yeah, I agree.

- I'm very concerned about air pollution. Because people pollute it.

- I agree with you!

- They build cars, factories, and all these exhaust gases are harmful to humans.

- Yeah. But i'm very-very concerned that forests are destroyed.

- Me too! Oh, I'm sorry, but I need to go. Thanks for your meeting!

- Okay! Thank you too! Bye!

Объяснение:

Learn English! It is need for your life! GOOD LUCK!