Though biotreatment of food waste was considered environmentally friendly, food waste composting causes more serious acidification and nutrient enrichment than landfilling because of NH3 and SO2 emissions during decomposition. Using compost on farmland can marginally reduce globalwarming, acidification, and ecotoxicity and human toxicity through N, P, and K fertilizer substitution. However, what should be noticed is that compost used on farmland also contributes to nutrient enrichment due to N loss via NO3−.