Climate change has been considered by the scientific community as the most serious environmental problem ever faced by humanity. The studies performed, even with uncertainties, indicate a strong relationship between human actions, global warming and consequent climate change. Hotter summers, colder winters, severe droughts and floods, tornadoes, desertification, water and food scarcity and biodiversity loss are some examples of the impacts caused by this imbalance. The mitigation or control of a problem with this magnitude deserves undoubtedly attention of governments and companies responsible for the large emissions of greenhouse gases, considered as responsible for the climate change. However, other sectors can and should contribute to the achievement of the global targets set by international agreements. Regarding the uncertainties and expectations on climate change, in 1988 the Intergovernmental Panel on Climate Change (IPCC), consisted of scientists from around the world, was created to provide information related to the causes of climate change, its consequences and possible actions to reduce the impact on the earth. IPCC reports are published regularly and become a reference for the formulation of public policies and for use by experts and students. The IPCC in its 4th Assessment Report, indicates a 70 percent increase in anthropogenic emissions of greenhouse gases in the period 1970-2004, where the carbon dioxide (CO2) is the largest contributor. For the same period, CO2 annual emissions increased 80 percent and represented 77 percent of total anthropogenic emissions in 2004. This increase is mainly due to the consumption of fossil fuels and changes in land use. Once established the relationship between greenhouse gases and global warming, it became evident the need for measurement and quantification of emissions for achieving any progress in the management of the problem. For that, a common, standardized, transparent and reliable methodology was desired. Developed in the United States by the World Resource Institute (WRI) in 2001, the GHG Protocol seeks to understand, quantify and manage GHG emissions of companies and nowadays is the most frequently method used worldwide for performing GHG inventories. It is also compatible with standard ISO 14064: 2007 - Greenhouse Gases and the methodologies for quantification issued by the Intergovernmental Panel on Climate Change.