For any LAGreenBean fans out there, (anyone, anyone?) Go Green Girl makes a shirt with a logo of a "Mr. Green Bean" on the front. He's pretty cute, with large marble eyes. Too bad I don't know him. But from the logo, he looks like a good bean.
Now, any clothing company marketing itself as "green" should recognize that buying/selling new clothes is the least "green" thing you could do. And the company does not mention if it uses second-hand materials in its shirts. But the company does promote that its shirts are sweatshop-free.
Also, the shirts are 100% organic and have an educational spin to their designs.