Task 1. Write complete sentences about air pollution, using the words and phrases below. You may have to add linking words and make changes in the word form, if necessary. (Viết câu đầy đủ về ô nhiễm không khí, sử dụng các từ và cụm từ bên dưới. Bạn có thể phải thêm từ liên kết và thực hiện thay đổi trong mẫu từ, nếu cần.)

1. One / biggest environmental impacts of human activities / air pollution

2. Smoke / aircrafts / factory chimneys / bonfires / different kinds of vehicles / streets / many / other factors / damage / clean air / every day

3. Industrial factories / throw / air / huge amounts / pollutant gases

4. The air / many areas / so unclean that / people / have to / masks / going / streets

5. Air pollution / lead / greenhouse effect / make / temperature / Earth's surface / higher

6. Global warming / lead / polar ice caps melting / rise of worldwide sea levels / climate changes / other natural disasters.

7. Everyone / live / earth / should have / responsibility / reduce / air pollution / protect clean air / our survival

8. Worldwide governments / should have / control measures / reduce air pollution / and / protect / natural environment / future generation