Geography

5. Type of graph used to represent and compare two sets of data
6. Relating to the countryside
7. Major traffic
8. An educated guess
10. Green area for relaxing or playing
12. A condition that can cause coughing, wheezing, chest tightness and breathlessness

1. Introduction of gases such as Carbon Dioxide into the natural environment that cause global warming and health issues
2. All about people and places
3. A lung infection, made worse by pollution
4. Relating to towns and cities.
8. Sentient being
9. A road or highway that avoids a built-up area
11. What you do on a bicycle