Free-market economist Julian Simon remarked "There are three ways society can organize waste disposal: (a) commanding, (b) guiding by tax and subsidy, and (c) leaving it to the individual and the market".
自由市场经济学家朱利安·西门（Julian Simon）称：“社会有三种办法组织废品处理：一、指令；二、税收和补贴；三、个人与市场”。