Battery recycling plants in the developing world are leaving local children with dangerous levels of lead in their bodies.
Astronomers have discovered the densest rocky planet yet. Named 55 Cancri e, it's 60 per cent larger in diameter than Earth but eight times as massive - making it twice as dense as Earth, and almost as dense as lead.
Reds are the worst. They have eight times the amount of lead allowed under California law. But all of the light-emitting diodes (LEDs) tested by UC Irvine scientists were brimming with toxins - lead, arsenic and many other potentially hazardous substances - linked to cancer and other horrible diseases and maladies.
LEDs are one of the few types of lighting that actually give you enough light to see by, while still being good for the environment... or maybe not.