Tiếng Anh 8 - Sách học sinh - Tập hai (Thí điểm hệ 10 năm) | Unit 7 Pollution | A closer look 1 a. Decide which sentence in each pair of sentences is a cause and which is an effect. Write C (for cause) or E (for effect) next to each sentence. Note that the words in brackets relate to Activity b.