Where rich people see trash, poor people see all kinds of opportunities.For example,in the united states,some people make a living by picking up trash.They collect bottles and cans from the streets or trash cans and bring them to recycling centers for cash. In American and European cities,homeless people also sometimes make use of trash cans.They look in them for food and clothes that have been thrown out.They occasionally even sleep in large trash bins.In many developing countries,poor people collect trash directly at the city garbage dumps.In Cambodia,Nigeria,India,and Brazil,for example,these people-including many children-look through the trash for usable objects or materials such as plastic,glass,or metal.Then they sell the objects or materials to small companies that find ways to re-use or recycle them.