Learning Objectives
1. first listen to and then talk about environmental problems
2. read about an interview of a group of exports on environmental problems 
3. write about what we should do to protect our Earth
4. practice reading skills: word attack strategies
5. practice translating skills: extension
6. learn and practice sentence functions
7. learn how to write a letter of invitation to an symposium, forum or conference
8. visit Culture Salon about our environment