Recycle bags are provided by custodial services in various areas of the new building. White paper is placed in the white bags. Colored and mixed paper, or paper with any kind of sticky substance (envelopes or things with labels), and anything other than regular white paper (e.g., magazines, newspapers, cards) is put into the green bags. Ream wrappers for copier paper are not recyclable because they are chemically treated. Cardboard boxes, after being emptied, must be flattened and placed by waste baskets in labs or offices, or behind the recycling bags. The custodian will remove a limit of six flattened, medium size cardboard boxes at any one time if they are placed by the waste baskets.