evidence: Greenhouse gases include carbon dioxide, methane, nitrous oxide, water vapor, tropospheric ozone and F-gases, which include chlorofluorocarbons (CFCs), hydrochlorofluorocarbons (HCFCs), hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6). Carbon Dioxide (CO2) is the primary greenhouse gas contributing to recent climate change. It is absorbed and emitted naturally as part of the carbon cycle. However, human activities, such as the burning of fossil fuels and changes in land use, release significant additional amounts of CO2 into the atmosphere. [...] Water Vapor is the most abundant greenhouse gas and also the most important in terms of its contribution to the natural greenhouse effect, despite having a short atmospheric lifetime. Some human activities can influence local water vapor levels. However, on a global scale, the concentration of water vapor is controlled by temperature, which influences overall rates of evaporation and precipitation.