PBDEs, or polybrominated diphenyl ethers, are a class of fire retardant chemicals. They can be found in a range of products, like TVs, toasters and mattresses. Their purpose is to decrease the rate of ignition and fire growth, giving people more time to react in the event of a fire. PBDEs have recently become a topic of concern, because of their tendency to bioaccumulate in nature and cause several adverse health effects in humans. Their production and use is decreasing globally, but is still in use, for example in television casings in the US.