Less than 0.4 percent of Germany's total primary energy supply came from geothermal sources in 2004.
These account for 63 per cent of the primary energy used in Sweden.
Own production was 2% of primary energy in 2008.
Relative to the Earth, the positive and negative lines of primary energy are working in opposition.
All bodies in space are motored by primary light energy.
The share of primary energy dedicated to electricity production is above 35%, and grew steadily since 1970s.
About 97% of the primary energy use was imported in 2008.
They require more primary energy for their manufacture than solid lumber.
We need a much higher proportion of primary energy used.
Other sectors, like transport and agriculture, amount to about 22% of primary energy available.
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