The charts below show changes in the proportion of the energy produces from different resoruces in a country in 1985 and 2003.

The two pie diagrams above show the diversification in energetical resources of a Country from 1985 to 2003. The

energy

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sources taken into consideration by the survey are oil, natural gas, coal, nuclear, hydro and other renewable in general. At first glance, we can see how the majority of the energetical needs are still met by petroleum in 2003, which maintains its

primatum

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premium

primate

as the most used natural resource since 1985, with its usage decreasing just 10 percentage points in 20003 compared to 1985.

However

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, we are able to highlight some positive changes in the importance of some of the other materials. Starting from the use of nuclear

energy

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, nuclear in 1985 satisfied 22% of the Country's energetical needs,

whereas

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in 2003 its usage decreased to just 8%.

Instead

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, coal has achieved higher importance in the

energy

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chain since 1985, from satisfying just the 8% of the demand to 22% in 2003. A positive change interests natural gas as well:

while

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in 1985 it sustained just 13% of the

energy

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produced

overall

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that year, in 2003 the

energy

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provided increased by double, reaching 23%. Data show a slight increase in the use of other renewable

energy

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sources of three percentage points, even though those still remain the less productive of the group.