Bài 2: Match the halves to make complete sentences 
1.  It won't affect the wildlife              A. if we keep using too much plastic
2. There will be fewer birds               B. if we don't stop damaging their homes 
3. If there is too much trash on beaches ,               C. if people use too many cars and mortobikes 
4. We won't be able to stop land pollution                 D. fewer people want to visit them 
5. Air pollution will worsen                                   E. if we keep the rivers and seas clean