Final answer:
Greenhouse gases, such as carbon dioxide and methane, contribute to the greenhouse effect and global warming. These gases are released from various human activities, including burning fossil fuels. Synthetic fluorinated gases also contribute to the greenhouse effect.
Step-by-step explanation:
Greenhouse gases are radiatively active gases that absorb and re-radiate infrared energy, causing the greenhouse effect. The major greenhouse gases include carbon dioxide (CO₂), methane (CH4), nitrous oxide (N₂O), and synthetic fluorinated gases such as hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6). There are also other gases such as ozone and chlorofluorocarbons (CFCs) that contribute to the enhanced greenhouse effect. These gases are released from various human activities, including the burning of fossil fuels and deforestation.