Across
- 2. This gas reacts with carbon to produce a gas that is linked to climate change.
- 6. These may cause global dimming
- 12. Substances that have been made by people not by nature.
- 13. A problem that most scientists believe is partly caused by carbon dioxide.
- 14. These gases are known as NOx.
- 15. An environmental problem caused by particulates.
Down
- 1. Harmful chemicals that have been added to the environment
- 3. A gas in the air that has very strong bonds within its molecules.
- 4. This element is found in fossil fuels such as coal.
- 5. A health issue that can be triggered by nitrogen oxides.
- 7. A disease that may possibly be caused by particulates.
- 8. _____ dioxide gas is produced when fossil fuels burn in a good supply of oxygen.
- 9. The type of blood cells that transport oxygen around the body.
- 10. _____ fuels include coal and oil.
- 11. A fuel produced from oil that has longer molecules than petrol does.