In the report 2001 by the Intergovernmental Panel on Climate Change (IPCC) projects that climate could warm by as much as 10º F over the next 100 years and we already observed a warming of about 1º F since 1900. Therefore, how to mitigate the greenhouse gas effect is a very important issue since it affects everyone alive and not born. This paper mainly discusses the impacts of greenhouse gas emission that affects people the most. This paper mainly discusses the following questions: 1) what factors lead to the greenhouse gas effect? 2) How can pyrolysis become a potential source to mitigate the greenhouse gas effect and what are the choices we may have? Pyrolysis, as another bioenergy alternative, helps climate change mitigation while it also produces biochar that fixes carbon as a more stable form that has additional value when applied in agricultural land. GHGs come from the use of fossil fuel (CO2), nitrogen fertilizer application (N2O), and livestock enteric fermentation (NH4) and we need to find some strategies to reduce the emissions of GHGs such as crop fertilization alteration, crop tillage alteration, livestock management, manure management and biofuel production. Since CO2 play the most important role in the GHG effects, the goal of this paper is to find the alternative energy to help mitigate the GHG effects by reducing the amount of CO2 emissions. The forest can be a candidate because it has the function of carbon sink and is able to produce energy biomass. Forests really do a good job that reduce the amount of CO2 in the air, however, since the carbon value and interest rate will affect the optimal rotation length, it becomes uncertain whether or not the forest will be able to provide a stable input for energy production.