Are Australian and German Houses Energy Efficient?

Compare energy use from buildings in Australia to Germany and define whether Australian houses are energy efficient or not.

Compare energy use from buildings in Australia to Germany. Are Australian houses energy efficient (hint: no)? To what extent can energy and hence emissions be reduced if different building standards were adopted? What are the cost implications of such adoptions, and what is the potential for energy savings for the duration of a building (assume a lifetime of 70 years for a building)?