Across
- 2. Carbon monoxide, nitrogen oxides and unburnt hydrocarbons can be removed through ____ converters in car exhaust systems.
- 6. Its use leads to the depletion of the ozone layer.
- 8. The result of the reaction of nitrogen oxides, carbon monoxide and volatile hydrocarbons in the presence of sunlight.
- 9. Carbon _____ takes up 0.03% of the air surrounding us.
- 10. This pollutant is produced during the decay of plant and animal matter, rubbish, and in the digestion of food of livestock.
Down
- 1. Nitrogen Oxides cause the _____ of eyes and lungs, and breathing difficulties due to lung inflammation.
- 3. Carbon _____ comes from the incomplete combustion of carbon-containing furls in car exhaust systems.
- 4. _____ smog develops when primary pollutants interact under the influence of sunlight to produce hazardous chemicals (e.g. ozone).
- 5. A type of gas which causes global warming.
- 7. Acid rain results in the ____ of metal and limestone structures.