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--- basics:energy_and_ecology:primary_energy_quantifying_sustainability [2020/08/09 13:42] – [Primary energy – quantifying sustainability] wfeist
+++ basics:energy_and_ecology:primary_energy_quantifying_sustainability [2020/08/09 13:50] (current) – [Primary energy – quantifying sustainability] wfeist
@@ Line 9: / Line 9: @@
   * thus also for the household electricity in a residential house (shown in “yellow” in the following illustration).
-//Note: the current calculation method of the Energy Saving Regulations (EnEV) does not take the domestic electricity into account//.\\
+//Note 1: the current calculation method of the Energy Saving Regulations (EnEV) does not take the domestic electricity into account//.\\
+//Note 2: The world is furtunately substituting more and more not renewable energy sources by renewable energy sources. These source do have much less dangerous environmental impacts; but these also need some limited resources (e.g. land use). In the future, it will become more and more important, to design an energy system in a way, that the renewable energy generation can be kept within sustainable limits. This is, what the new [[:certification:passive_house_categories:per|"primary energy renewable" PER]] method has been developed for.
+//\\
 \\
 |{{ :picopen:primaerenergiekennwertvergleich_k.png?390 }}|