Agriculture Reference
In-Depth Information
Figure 8. Comparison of damage assessment for sugar beet`s ethanol from Belgium, France, UK and
diesel, petrol and electricity from various sources per FU and total impacts.
D
ISCUSSION
Literal meaning of biomass from which biofuel is obtained is “mass made of life” (
gr.
bios- life; maza- mass
) and although “life” of combustion engine started by liquid biofuels,
their consumption decrease due to the chipper oil. But in recent years consumption of biofuels
grows exponentially. This biofuels consumption increase can be assigned on one hand to the
concerns about climate changes and on second hand to limited resources of petrol. Therefore,
liquid biofuels are revived as potential substitution for fossil fuel.
Although liquid biofuels are made of renewable energy sources, it is not necessary that
do not represent damage to environment. At the same time two main concerns appeared. One
is dealing with ethical issues e.g., combusting the food for power the vehicles, while billions
are starving, and the second, is based on sustainable production. And above all will we be
capable to produce enough quantities of biofuels to achieve goals that were set by policy
while meeting the projected climate changes.
Since 1906, global air temperature has increased in average for 0.74 C ± 0.2. For the
next two decades it is expected that the air temperature will arise for about 0.2 C per decade.
According to the recent observed trends [91] it is expected that the highest temperature arise
will occur over the land. There have been numerous studies caries out to find out the possible
impacts of air temperature increase or decrease [46, 47, 58, 92-94]. These results pointed out
that the most affected sector by climate change and variability will be agriculture. This fact is
due to the crop‟s production dependence on climate [95, 96]. It is expected that the length of
growing season for crops in agriculture will extend [97].
