I saw this imagine here which I included below. As confusing as a lot of this green stuff can be, I think the need to recycle things is simplified well here. The image speaks for itself.
Here are a few places to consider when you are getting rid of your old cell phone.
1. Cellphones for Soldiers.
2. Recycle my Phone
3. Call to recycle will take cell phones and batteries.
4. Recellular has a way that you can get paid to recycle.