Junk mail is a nuisance and a waste. Check out these resources to help green your mailbox!

The annual greenhouse gas emissions from junk mail equate to the emissions of 3.7 million cars
Each year, 5.6 million tons of catalogs and advertisements are discarded into U.S landfills
Unwanted mail can expose your private information such as your name, address, and purchasing decisions
DirectMail.com may be a source of help. On this site, you may register for the National Do Not Mail List for free. On the forum, you can indicate if there are any mailings you would like to keep receiving. Most companies will oblige this list as they do not want to waste money sending their publications to unreceptive audiences
Catalog Choice is another service that may help. This free service allows you to cancel specific catalogs by submitting opt-outs on your behalf. It allows you to easily protect your privacy, reduce unwanted clutter, and help the environment!