BIOENERGY FOR EUROPE: WHICH ONES FIT BEST?
BIOENERGY FOR EUROPE: WHICH ONES FIT BEST?
BIOENERGY FOR EUROPE: WHICH ONES FIT BEST?
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162 7 Annex<br />
7.2.5 Rape seed oil methyl ester (RME) versus fossil diesel fuel for transportation:<br />
relative impact differences between biofuels and fossil fuels<br />
2500%<br />
2000%<br />
1500%<br />
1000%<br />
500%<br />
0%<br />
-500%<br />
Use of fossil fuels<br />
Greenhouse effect<br />
How to interpret the diagram<br />
Ozone Depletion by N2O<br />
Acidification<br />
Eutrophication<br />
Summer smog<br />
Human toxicity<br />
Austria<br />
Denmark<br />
France<br />
Germany<br />
Switzerland<br />
Europe<br />
Environmental advantages and disadvantages of RME compared to diesel fuel for each country involved<br />
as well as for Europe are shown by relative differences between the biofuels and the fossil fuel:<br />
(biofuel – fossil fuel) / fossil fuel. The zero line indicates the level for fossil fuels. Therefore negative<br />
values indicate advantages for RME and positive ones represent advantages for diesel fuel. For example,<br />
assuming the production and combustion of fossil fuel causes an emission of 1 kg of N2O (Ozone<br />
depletion), then a value of -100 % means no net N2O emissions in the case of the biofuel, 0 % means 1<br />
kg N2O (i.e. the same as the fossil fuel), 100 % means 2 kg N2O and so on.<br />
Remarks and conclusions<br />
The results show relatively large differences between the countries for the most of the impacts. Also in<br />
the case of the greenhouse effect there are big differences with France showing the lowest benefits and<br />
Austria the highest benefit. Regarding ozone depletion, the highest impacts are recorded in France and<br />
the lowest in Austria; the pattern is determined by the ratio N fertiliser/yield. In the case of eutrophication,<br />
for Austria the sum of several smaller factors leads to certain credits, resulting in a negative value<br />
(advantage compared to diesel fuel), while for Switzerland the reason is that in the case of the agricultural<br />
reference system (fallow) higher PO4 3- emissions to water occur than for RME, giving a very high<br />
credit. The results on acidification is affected by credits of SO2 emissions to air in Austria and Switzerland.