How recent does a source references need to be ? At what date does a source (data or scientific report) become outdated and not valid to use as a reliable reference of energy calculation or assumptions? Would you consider resources published in the last 2 years, 5 years, 10 – in the case where we could not find anything more recent.
Just to clarify on this question – would it be wrong to find a value for carbon emissions of a house similar to the one we live in and use that value for our carbon footprint? Or do we need to calculate a value for carbon emissions ourselves?
Also, would you recommend calculating energy use first then converting this into carbon emissions or just finding a value for carbon emissions directly?
