Table 1 shows information about the emissions of various pollutants from a domestic heating oil boiler and a domestic wood pellet boiler.
Table 1
| Pollutant | Mass of pollutant emitted in mg per megajoule (MJ) of energy | |
|---|---|---|
| Heating oil boiler | Wood pellet boiler | |
| Carbon monoxide | 12 | 85 |
| Nitrogen oxides | 50 | 75 |
| Particulates | 1.5 | 35.0 |
| Sulfur dioxide | 18.0 | 4.2 |
Give two ways in which the data in Table 1 shows that the wood pellet boiler is more damaging to the environment than the heating oil boiler.
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