Greenhouse gas emissions from a wastewater sludge-amended soil cultivated with wheat (Triticum spp. L.) as affected by different application rates of charcoal

► Charcoal at ≥1.5% reduced the CO2 emission rate 27%. ► Charcoal at 4.5% reduced N2O emission rate 41%. ► Charcoal had no effect on CH4 emissions. ► Charcoal at 1.5% reduced GHG emission 2%, 3% 34% and 4.5% 39%. ► Wheat growth was inhibited in the charcoal-amended soil, but not yields.