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4Rs | reduction, reuse, recycling and recovery
| reduction, reuse, recycling and recovery | |
| UN | 4 erres; reducción, reutilización, reciclado y recuperación |
| English thesaurus | |||
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| reduction, reuse, recycling and recovery | |||
| 4Rs: 2 phrases in 1 subject |
| United Nations | 2 |