A month-long drive to recycle old, unwanted phone books on Oahu has generated nearly 86 tons of recyclable waste.

Officials for Hawaiian Telcom Yellow Pages and its sales agent say more than 170,000 directories were deposited at four drop-off points at malls around the island.

Officials say the directories will be recycled in several different ways. Some of the books will be used to generate fuel for Hawaiian Electric Co.

The drive is part of a "Think Yellow, Go Green" campaign also happening in other states, including Alaska, Kentucky and Nebraska.