Atmospheric gases refer to any gas present in Earth's atmosphere. These gases play a crucial role in regulating our planet's temperature, climate and weather patterns. Some common atmospheric gases include nitrogen (78%), oxygen (21%) and trace amounts of other gases such as carbon dioxide, methane, water vapor, and various noble gases. These gases are essential for life on Earth, but human activities have led to an increase in the concentration of certain atmospheric gases like carbon dioxide, which has contributed to global warming and climate change.