COMPARTE Twitter Facebook Telegram WhatsApp Copy Link Regulated by the Kyoto Protocol, these are Carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), sulphur hexafluoride (SF6) and two families of gases, hydrofluorocarbons (HFCs) and perfluorocarbons (PFCs). Related Articles: Circular economy: organic matter in the past, present and future