" By the early 20th century Sherwin was making paint with lead-based pigment, even after the company published an article in 1904 warning that "white lead is poisonous in a large degree, both for the workmen and for the inhabitants of a house painted with white lead colors.

FORBES: Chip Thrills

PCBs are used in many industries: as heat-exchange liquid in transformers, in paint additives and in making plastics.

CNN: THE GREAT DIOXIN SCARE

This home-turned-museum, known as La Casa Azul, is where Frida Kahlo was born, began to paint and died, making the house a witness to one of the most important artistic lives in Mexican history.

CNN: La Casa Azul: Witness to a personal history