In tonnes of oil equivalent, up 2.3% compared to the savings in 2015 (+745 toe), 177 despite the amount of thermal energy sold being in line with 2015 (-0.4%), due to production optimization, better grid management and a greater use of renewable sources compared to traditional boilers (in particular in Ferrara as a result of an improvement in 2016 to increase usage of the heat produced by waste combustion).