This is a conversation lesson with two PowerPoint presentations in editable PPT format, worksheets, an activity, and teacher’s notes.This topic is probably one of the most relevant and interesting conversation topics you’ll find, perfect for ESL students, since it’s a universal problem, experienced by everyone.I tried to collect and include as much ‘up-to-date’ research data as possible about the subject so that you could hold an informative discussion in class about it.In this lesson, we will d