Peter: Hey Mary, why are you throwing trash here? This place looks messy now.

Mary: Oh, I didn’t think it was a big deal. It’s just a small piece of paper.

Peter: I understand, but if everyone does that, the environment will get dirty and unhealthy. It’s better to throw trash in the bin.

Mary: You’re right. I should be more careful. I’ll pick it up and throw it in the trash can.

Peter: Thanks, Mary! Keeping our surroundings clean is good for everyone.