Recycling is the re-use of materials that would otherwise be considered waste. Those materials can be sources from pre-consumer waste (materials used in manufacturing) or post-consumer waste (materials discarded by the consumer).
Articles about, or including aspects of, recyling:
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... For every 100 females age 18 and over, there are 87.2 males.
The median income for a household in the city is $35,491, and the median income for a family is $43,564. Males ...