Paper must be kept separate from other recyclables because glass and metal fragments make the paper unsuitable for recycling. newspaper and flyers envelopes and letters office and school paper telephone books household bills book and scribbler pages receipts paper egg cartons paper carry out trays glossy paper magazines and catalogues NOTE: Hard covers from books are waste. CORRUGATED CARDBOARD clean, dry, and non-waxed tied in bundles and placed beside blue bags flattened Corrugated cardboard pizza boxes are recyclable.  Remove leftover pizza and liner and bundle with other cardboard. With the exception of corrugated cardboard, only recyclables in transparent blue bags will be accepted.