The iberians probably have cheap enough labour that they needn't bother, but a high-capital low-labour sol'n is to store rubbish deep enough* that even summer d

The iberians probably have cheap enough labour that they needn't bother, but a high-capital low-labour sol'n is to store rubbish deep enough* that even summer daytime temperatures don't hit their surface peaks: eg https://www.molok.com/benefits-and-principles/ https://www.molok.com/benefits-and-principles/ * Fourier apparently worked this problem in relation to wine storage; see also https://topex.ucsd.edu/geodynamics/HW3_2010_presentations/C_wine_cellar.pdf https://topex.ucsd.edu/geodynamics/HW3_2010_presentations/C_...