Решение:
- Cars make air pollution worse in towns.
- Their wages were very low so the workers went on strike.
- My great-grandfather died in the First World War (предполагается, т.к. в картинке 4 есть военные действия).
- Jack had a crash last year but fortunately no one was hurt.
- Japan often has earthquakes and Siberia often has blizzards.
- When people are homeless, they sometimes sleep on the streets.
- I hate driving in the city in the rush hour.
- The water is so polluted that people cannot drink it.
Ответ: 1. pollution; 2. strike; 3. War; 4. crash; 5. earthquakes, blizzards; 6. homeless; 7. rush hour; 8. polluted.