Where is this conversation most probably taking place?

W: The admission price is five dollars per person. That’s really expensive for just one exhibit.
M: You’re right. But if you have a student card you can get in for two dollars.

W: I wonder if our children will still be able to breath clean air, drink clean water and see blue sky.
M: I agree with you. I think it’s time man learned to live in harmony with the earth instead of just exploiting it.