Now, you’ve probably never heard of a reed switch, but it is a small circuit control that is used in many electronic devices. And their electronic contacts are wetted with mercury.
'I can't just throw it in the trash, but what can I do with them then?' you ask. The majority of e-waste ends up being recycled for use in developing nations (including China, India, Pakistan, Ghana, Nigeria and Ivory Coast) and there are plenty of e-waste recycling centers/companies around, especially for cell phones.