Changes in the concentrations of greenhouse gases present in the atmosphere are known by comparing the change modeled on astronomical cycles with the observed paleoclimatic changes. The comparisons allowed scientists and researchers to observe climate change and independently estimate changes in greenhouse gas concentrations. The most notable changes resulting from using this measurement are the concentration of carbon dioxide and methane as these gases are stored in peat, tundra, and ocean sediments during colder climates and are released into the atmosphere in a warmer climate. The release of carbon dioxide and methane caused a warming effect. Computer modeling can offer strong evidence to show that the role of greenhouse gases in changing the climate of the past and will further influence the future