Recycling and reclamation.
D000821:Animal Feed; D000818:Animals; D004197:Disease Reservoirs; D004467:Economics; D004782:Environmental Health; D004787:Environmental Pollution; D005898:Glass; D007501:Iron; D008670:Metals; D010209:Paper; D010969:Plastics; D012037:Refuse Disposal; D012408:Rubber; D013552:Swine; D013784:Textiles; D014481:United States
D008670:Metals; D010969:Plastics; D012408:Rubber; D007501:Iron