Listen to the passage and fill in each blank with no more than TWO words.
1. The exhaust fumes from vehicles are the main cause of _____ in our cities.
2. Bad gases can be very _____ for children.
3. Transport is not the only reason why we have _____.
4. Less pollution today comes from _____ than in the past.
5. Bad gases are being released into the air from _____.
1. pollution
2. dangerous
3. air pollution
4. coal
5. other sources
1. pollution
2. dangerous
3. air pollution
4. coal
5. other sources