I watched this TED clip a fair while ago, but it has stuck with me. Everyone uses various electrical gadgets, but I especially have a fondness for them. I also happen to think of myself as a moral person, and do all that I can to make moral choices with my purchases. But in this TED talk Bandi Mbubi shoots down most of that. He reveals the true cost of our gadgetry, beyond the horrible working conditions and low pay of the (almost) slave labour that builds much of it. Many of the gadgets we all use, maybe even the one I am using to type this and you are using to read this, have a bloody past; the tantalum mining that in part funds the war in the Democratic Republic of Congo. Just how much are our gadgets worth?