Here's an excerpt from an article about the USPS Go Green initiatives. I don't exactly know if this has any direct impact on stamp collectors, particularly as it relates to stamps retained for long term storage within a collection, but I did find this quote interesting:
Quote:
Green Postage
Postage stamps are recyclable and stamp adhesives are environmentally benign and recycling compatible. Tens of billions of postage products, including stamps and stamped envelopes and postal cards, are made with post-consumer recycled content.
Here's the source:
http://www.echopress.com/event/arti.../group/News/