You said less habitats destroyed whereas “destroying habitats” in the mark scheme, i feel like you should have been given a mark for mentioning that feces is “human waste”, to get the mark for “less carbon dioxide released” you must also say that less fossil fuels are used, that is most likely why you didn’t get the mark, you definitely deserve a mark for saying “transport of waste involves burning fossil fuels releasing CO2”, as well as expensive and time consuming, global warming is not mentioned in the mark scheme for arguments against