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have been composting

  • present perfect progressive
    of compost.
    compost
    noun
    a mixture of various decaying organic substances, as dead leaves or manure, used for fertilizing soil.

Example Sentences

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While farmers have been composting livestock for years, human composting has no legal precedent.

From The Verge Jun. 15, 2015

Other cities, like Seattle and San Francisco, have been composting school food for years.

From New York Times Jun. 22, 2014