E-waste refers to discarded electronic devices like computers, televisions, cellphones, and more. It is harmful because it contains toxic chemicals like lead, mercury, and cadmium that can pollute the air and water if improperly disposed of. Most e-waste is shipped overseas and dumped illegally or burned. Only 13% is recycled properly even though millions of devices are discarded each year, contributing to pollution and waste. The document encourages recycling e-waste at proper facilities to help address this issue.