Most recycling behavior studies focus on two directions: One is to find out the relationship between attitude, knowledge, and recycling behavior; the other is to use behavior intervention to promote recycling behavior. Both perspectives simplify recycling as a singular and static behavior. In fact, recycling involves many interrelated aspects. It depends on the macro economic conditions, the available physical facilities, the beliefs and customs of local residents, and of course, the policies. Moreover, recycling requires not only people's behavior (such as separating solid waste from recyclables); facilities and techniques-which are hardly controlled by individuals-, are indispensable. In Marx's words, it is another kind of alienation. On one hand, it means that people cannot decide what to recycle because they do not have those facilities and techniques, even though they know it should not be thrown as garbage. (This is why New Yorkers cannot recycle styrofoam while Germans can.) On the other hand, recyclers do not know what will happen after they take every effort to sort things out. Sometimes the suspicion of 'maybe eventually everything will be gathered together to an incinerator' indeed stops people from recycling.