| |
| | Fossil Fuels |
 | | Coal, oil and gas are called fossil fuels because they form over millions of years through the decay, burial and compaction of rotting vegetation on land (coal), and marine organisms on the sea floor (oil and gas). |
 | | Burning fossil fuels in this way releases a number of air pollutants, including sulphur dioxide, nitrogen oxides, carbon monoxide, particulate matter and VOCs, such as hydrocarbons, which can all lead to poorer air quality. |
 | | The present global use of natural gas is approximately 20% of all fossil fuel use, and this figure is predicted to rise in the future. |
| www.ace.mmu.ac.uk /eae/Air_Quality/Older/Fossil_Fuels.html (467 words) |
|