1. What is smog made of? smelly cats fog and smoke  2. Factories produce ____ sulphur dioxide oxygen  3. Cleaner cars use ___ unleaded petrol leaded petrol  4. Carbon dioxide is ___ a garden shed liquid a greenhouse gas  5. Is coal a fossil fuel?. YES NO  6. A wind farm makes wind. YES NO  7. Can volcanoes make acid rain? YES NO  8. The world is getting warmer. YES NO  9. Recycling is ____ cycling down the road twice re-using rubbish and not throwing it away