Dead Computers in Ghana
The NY Times has a photo op called "A Global Graveyard for Dead Computers in Ghana" that shows how Ghana is dealing with its ever-increasing number of dated computer equipment. The computers, which come mainly from the U.S. and Europe, are sent as charitable donations with the hope that they will reduce the digital divide. But as the pictures show, the recipients find more value obtaining the precious metals inside the computers, than using the computers themselves.

Due to the toxicity of those metals as well as the unorthodox methods of extracting them from computers, our donations are actually polluting Ghana. Greenpeace sampled the soil there and found high levels of lead and cadmium, among other not-so-friendly elements and compounds.
It's quite a dilemma. On one hand, it feels great to give to the less fortunate but on the other hand, our charitable gifts sometimes have adverse effects. Unfortunately, it's not always obvious (or documented) how things will turn out.
The last slide sums up the dilemma very well:
"The Basel Convention on the Control of Transboundary Movements of Hazardous Wastes and Their Disposal, agreed to in 1989 and now adopted by a majority of notions, was meant to stop the dumping of toxic waste in poor countries. But rules get complicated when waste arrives as a gift."