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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7.1 Country specific life cycle comparisons 143<br />
Traditional firewood versus light oil and natural gas for heat production – Italy<br />
Use of fossil fuels<br />
Greenhouse effect<br />
Acidification<br />
Eutrophication<br />
Summer smog<br />
Nitrous oxide**<br />
Human toxicity**<br />
* How to interpret the diagram<br />
Trad.firewood vs Light oil<br />
Trad.Firewood vs Natural gas<br />
Advantages for<br />
biofuel<br />
Advantages for<br />
fossil fuel<br />
-1100 -900 -700 -500 -300 -100 100<br />
Italian inhabitant equivalents* per 100 TJ<br />
The figure shows the results of comparisons between complete life cycles where traditional firewood is<br />
used for heating purposes instead of Light oil and Natural Gas. The unit refers to an amount one hundred<br />
TJ. This is equivalent to the average heat requirement of about 4,000 inhabitants of Europe in one<br />
year. In this case for example the amount of fossil fuel saved using traditional firewood instead of Light<br />
oil is equal to the amount which about 1,000 Italian citizens would on average consume in one year<br />
(this is what is meant by “Italian inhabitant equivalents”). Again the use of traditional firewood instead<br />
of light oil leads to a reduction of acidification equal to that that 50 Italian citizens would cause in one<br />
year.<br />
Conclusion<br />
The results show that traditional firewood has a good advantage over light oil and natural gas:<br />
• Advantage for traditional firewood: use of fossil fuels, greenhouse effect, summer smog, acidification<br />
versus light oil<br />
• Advantages for fossil fuel: eutrophication, acidification versus natural gas<br />
The data for ozone depletion and human toxicity tend to have a high uncertainty. Therefore these categories<br />
should not be included in the final assessment. (**For more information on this and the other<br />
environmental parameters investigated see Chapters 3.3 and 3.4 as well as 4.1.2.)<br />
A further assessment in favour of or against firewood or light oil cannot be carried out on a scientific<br />
basis, because for this purpose subjective value judgements regarding the individual environmental<br />
categories are required which differ from person to person. Whether firewood is assessed as better or<br />
worse than light oil or natural gas depends upon the focus and priorities of the decision makers.