Greenhouse+gasses

//Carbon dioxide//- This is also known as CO2, it is developed from the combustion, in a sense burning, of material. Most CO2 was put into the planets atmosphere early by volcanic activity.
The Graph from (Schipps Institute of Oceanography) shows the carbon dioxide concentration of Mauna Loa, Hawaii. //Nitrous oxide//-Another by product of combustion and from excess nitrogen fertilizer on crops. //Methane//-This is emitted into the atmosphere by cattle, landfills, bacteria in rice patties, and extracting it from coal. There is less methane being released into the atmosphere, however it can absorb up to 20 times more energy than CO2. //Water Vapor-//As the temperature of the earth gets warmer the water heats more and there is more water vapor emmited, "As water vapor increases in the atmosphere, more of it will eventually also condense into clouds, which are more able to reflect incoming solar radiation (thus allowing less energy to reach the Earth's surface and heat it up)." (source NOAA) //Fluorocarbons//-A gaseous halocarbon compound in which fluorine replaces some or all hydrogen molecules, used as aerosol propellants, refrigerants, solvents, and lubricants and in making plastics.

Graph taken from NOAA

Picture from How it works.com Some common culprits of greenhouse gas emission are shown above ( from left factories/industry, cattle, and cars). They emit such gases as CO2 and methane.