Harmful substances in e-cigarettes assessed While e-cigarettes are less harmful to health than tobacco cigarettes, the vapour from an e-cigarette contains substances and chemical impurities in concentrations that could be detrimental to heal
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.