HFC greenhouse gases accumulate in refrigerators and air conditioners Hydrofluorocarbons (HFCs) are potent greenhouse gases used in refrigerators and air conditioners and are released primarily at the end of the life-span of these products.
Further research into hazards posed by e-cigarettes Safety of nicotine-containing electronic cigarettes (e-cigarettes) cannot be confirmed because of the limited amount of published research in this area.