GreenDimes is a company that has been endorsed on Oprah, Ellen. Matt Damon uses it among so many others. GreenDimes actually helps
"stop up to 90% of your junk mail and plant 10 trees on your behalf"
So it saves trees already planted, plants new ones and reduces unnecessary waste!!!
Don't forget to check out GreenDimes blog. It has some great ideas.
As far I know all the services that get rid of junk mail for you do cost money. However, I would love it if someone were to tell me different.
Of course, if you don't want to pay for this service, at least recycle your junk mail.