In response to criticism from groups like Greenpeace, Apple has now implemented a new recycling program designed to reduce the amount of damage that mass consumption can cause. In addition to products like iPods, people will now be able to recycle cellphones, no matter who the manufacturer might be. You can send the devices to Apple in one of two ways – Either by dropping it off at an Apple Store near you, or mailing it to a central location.
If you choose the mail option you can specify any quantity of phones or iPods. You must then decide whether to use either a print-out label on your own packaging, or you can request a custom package shipped from Apple which will take 7 to 10 days to arrive. Both options are free of charge.
You can find more info about it right here.