Greenhouse Gases

Greenhouse gases are a family of gases that contribute to the formation of a "heat trap" in the atmosphere, contributing to increased warming of the planet. Some greenhouse gases occur naturally. Those include:
water vapor, carbon dioxide, methane, nitrous oxide, and ozone. However, human activities contribute to the increased level of these gases and thereby accelerate the process of global warming:

Carbon Dioxide is released into the atmosphere through the burning of: wood, wood products, gas, oil, coal and solid waste.

Nitrous Oxide is produced during industrial and agricultural activities as well as through burning processes involving gas, oil and coal.

Methane is is released during the production of coal, gas and oil.

Greenhouse gases that are created through human activity only include:
Hydrofluorocarbons (HFCs), Perfluorocarbons (PFCs), and Sulfur Hexafluoride (SF6).

Secondary greenhouse gases include carbon monoxide and all nitrogen oxides. Those gases don't function as greenhouse gases immediately upon their release, but after about ten years of presence in the earth's atmosphere.